Which part actually changes between 4 units and 20?

Financing, and it isn't close for a passive investor.

If you're never going to operate the thing, the operations answer is somebody else's job description. What you can actually get wrong from where you sit is the capital stack. Bridge debt with a two year term and an extension test you don't understand is how people lost money in 2023 and 2024 on assets that were leasing fine. The rent roll was okay. The loan came due.

Learn to read the debt page first. Term, index, extension conditions, what triggers a cash trap.

I'm about to close my first single rental so I'm the least qualified here, but the thing that surprised me reading a couple of these apartment decks is how much of the operating statement is payroll and marketing. On a house those lines don't exist. That made the operations answer feel more real to me than I expected.

I manage for a living and I'll argue against my own side a little.

Operations is where the money leaks, yes. Bad turn times, a leasing office that doesn't follow up, deferred maintenance getting priced into a turn budget that was set two years ago. All real. But @anchor, you as a passive investor cannot fix any of it. You can only pick a sponsor who has it handled, and the way you check that is by reading their trailing twelve against their pro forma and asking why the deltas exist.

So the skill you go learn is still reading statements. It just happens to be the operations statements. Ask for the trailing twelve, the current rent roll with lease expirations, and the last four quarters of variance reports. If a sponsor won't show variance reports that tells you something.

@trellis that's the most useful framing I've read on this, because it collapses the poll. I want income without a second job, so anything that requires me to have an opinion about turn times is out. Reading statements I can do on a weekend.

There's a third thing neither camp named and it's the one I'd learn first, which is the documents. At four units you sign a note and a deed. At twenty plus in a syndication you sign an operating agreement or LP agreement that decides who gets paid when, who can call more capital, what happens if the sponsor wants to sell early, and what you can do if they don't communicate. None of that shows up in the operating statement or the loan terms.

I'd put financing above operations for a passive, and the governing documents above both. A lawyer reviewing your specific subscription package is worth the fee, and I'm not one.

Voting financing but @warrant moved me. I read a limited partnership agreement last month for the first time and I understood maybe half of it, and the half I understood was the half that mattered least. The capital call language was three sentences and it took me an hour to work out what it actually let them do.