One email, three options, and a number he could not see.
Our best client — twenty-plus transactions with us — emailed about a $400,000 rental he owns. He is facing a vacancy, and he had one question with three parts. Should he put it back on the rental market and re-rent it? Should he sell and cash out, and move the money into something else? Or should he 1031 exchange into a different property, and if he did, could he hold anything like the same cash flow?
My gut already said the cash flow would not survive the exchange, even with the equity he had built for a down payment. But a gut is not an analysis, and he was making a decision worth six figures.
What this used to cost me
Build a spreadsheet. Get out a calculator. Spend a couple of hours writing a response detailed enough to actually help him decide. That was the old first move.
The step most agents skip
You can paste a client’s email into an AI chatbot and ask how you should respond. You will get a confident-sounding answer that is not backed by his numbers. National headlines it can find. Active rental listings it can sometimes find. What actually rented and what actually sold three streets over, in his submarket, it cannot.
So I gave Claude the email, and then I gave it two exports from my MLS. I ran the same searches I would run for a CMA — homes in his neighborhood, similar size, similar year built — once for sales and once for rentals. Almost every MLS exports search results to a CSV or Excel file, and Claude reads both.
One more piece: I asked the client for his approximate loan balance and interest rate. Without those there is no net sheet, and no honest comparison between the rate he holds and a new loan at a current market rate.
Without the data, Claude is guessing. With it, Claude can look at the sales, look at the rentals, and tell you what your client does not see yet.
What I actually typed
What should I tell him?
Five words. No engineered prompt, no seventeen paragraphs explaining how I wanted the data processed. This is the part I would most like more agents to try: give Claude the information, tell it what you need help with, and let it work.
It answered a different question
Claude did not answer right away. It pushed back. The first line said my client was anchoring the wrong metric — he was comparing three options on what each one pays him per month, when the number that matters is what keeping the property is quietly paying him already, and what he would lose by giving it up.
A search engine answers your question. A calculator runs your numbers. Claude pressure-tested whether the question was the right one — and it could only do that because it had real data to push back with.
Then it ran the numbers
Not value minus what he owes. An estimated net sheet — then the capital gains exposure if he sold now, then depreciation recapture on top of it. He does not get to take all of that money and run, and the number worth redeploying is what is left after the tax liabilities.
From there: annual cash flow, annual ROI against his equity position, and a blended return that adds up everything the property earns him — the cash flow, the loan balance getting paid down every month, and the appreciation. Blended and annualized, over 20 percent. On a property he already owns.
His interest rate is part of the asset
That is the move I would not have made on my own. Claude framed the mortgage rate as something he already owns — and selling or exchanging hands it back. He would be giving up the rate, the cash flow it produces, and that annualized return, every year, going forward.
The 1031 trap
An exchange does solve the tax problem. It also puts him into a replacement property at a much higher rate, which is hard on both cash flow and ROI. Even if he exchanged into a genuinely strong property, the $900 to $1,000 a month he collects now most likely becomes $300 or $400.
What a calculator cannot do
An exchange is not a building. It is what you trade into. This client was looking at trading a property closer in for new construction out in the far suburbs. Because Claude already had my MLS data, we knew that submarket was not performing like the one his house sits in — where you compete against builders handing out rate incentives, resale appreciation is hard to come by.
Newer, yes. Less maintenance, probably. But a softer market and a higher rate is an asset with worse fundamentals. It looks like progress. It is a downgrade.
What he wrote back
Claude also wrote the email. All three options handed back to him, the pros and cons of each, and a recommendation: re-rent it, if the goal is to grow his money at the highest rate available to him. It was more elegant than what I would have written in an hour.
He replied within minutes. Excellent advice, thank you, I am going to re-rent it. About ten minutes of my time, a decision he could stand behind, and a client relationship that keeps going.
Do this with your next client email
- Paste the whole email in. Not your summary of it. His wording tells Claude what he is actually worried about.
- Give it the data behind the question. For a property question that is two MLS exports, sales and rentals, run like comps for a CMA.
- Fill in what only the client knows. Loan balance, interest rate, and what he is trying to accomplish with the money.
- Ask plainly what you should tell him. Then read the pushback before you read the answer — that is usually the valuable part.
Next time a client asks something you are not sure how to answer thoroughly, that is the move. Not a generic reply that helps nobody.
Three builds that start with an MLS export.
Before you try this on a real client.
Do I need a long, detailed prompt for this?
No. I typed five words: what should I tell him? The work is in what you hand it — the client email, the two MLS exports, the loan balance and the rate. Give Claude the information, tell it what you need, and let it work.
Which MLS exports do I need?
Two. Run the same search you would run for a CMA — homes in his neighborhood, similar size and year built — once for sales and once for rentals. Almost every MLS exports search results to a CSV or Excel file, and Claude reads both.
What does Claude need that only my client can tell me?
The approximate loan balance and the interest rate. Without those there is no net sheet, no capital gains estimate, and no honest comparison between the rate he holds now and a new loan at a current market rate.
Is this tax advice?
No, and do not present it that way. The capital gains and depreciation recapture numbers came back as estimates, sized well enough to compare three options against each other. The CPA still signs off on the tax side.
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