If the latter, that complicates things.

C Corp's double taxation rules definitely makes things complicated. 

But -- there may be structural planning opportunity there if they are C Corps.At a high level, you're creating a lot of nexus and potential filing obligations by buying each new property in a new US state.Your situation is complicated enough to warrant long-term, professional advisors.You'll need to consider not only your US income tax exposure and obligations, along with which tax elections and tax entity structuring is most favorable, but also your US estate tax exposure and your tax obligations in your resident country relating to the US situs assets and income. 

If you don’t have a separate account, you’ll spend a lot of unnecessary time sorting transactions and deciding whether they are personal, consulting or real estate related.  

Otherwise you end up paying unnecessary closing costs for a refi that will take you time to recoup and ultimately eat in to your cashflow.

But, it could be a little complicated for a smaller building like duplex/triplex.

My thought process is a young family wouldn’t be renting or buying a 2bd/1ba home to begin with so the need for a bathtub may be unnecessary.

Once you have refined your vision a bit, then look at involving a more complicated investment pool.Go out there and make the most of every opportunity!

My partner prepared one that we're going to try to get signed today, but it's so long and complicated that I don't think the seller will sign it.

However a lot of that financing is very complicated that it does not really flow down to the BP level investors at least not 99% of them..