Is there sufficient confidence in tokens?  

The reason is because the companies that back these assets, and some others, have a 1:1 between their tokens and the USD (I'm unfamiliar if EURS, THKD, and stables of other fiat offer 1:1).A possible scenario would be that you offer the seller to pay in a stable coin, like mentioned above.

But, the self-sufficiency test for FHA loans can be really difficult in SF, meaning that the market rent from units you will not occupy must be sufficient to pay for the mortgage payment. 

@Asher M.Possible, yes but like your lender pointed out it's going to be difficult to pass the self-sufficiency test (SST) for a legal 3-4 unit property.

@Max Bellino For smaller properties like your 2–4 unit multifamily buildings, an online cost segregation study is a quicker and more cost-effective option, providing sufficient accuracy for straightforward properties.

And the hardest part of all this is finding sufficient labor to rehab/manage the property.

There are good relations with the neighbor so this likely wouldn't be terribly difficult to pull off, but I haven't ever developed a property from scratch so I would definitely like the opportunity to partner with someone on this to help ensure the success but first I want to finish the smaller property to have sufficient funding available if it is needed.

Being the military, it had that definite institutional overtone to it, but the basic premise was the same.I recently toured a new senior's complex in which on end - for those who were still relatively self sufficient - had individual units (bedroom, sitting room / kitchenette ... effectively a bachelor apartment but without a full kitchen) clustered together in groups of 4 with their own common room / kitchen and courtyard.On the other side of the complex were units for those who required more assisted living.  

First off, many sellers don't have sufficient equity to offer seller financing. 

For a single property, a strong umbrella insurance policy may offer sufficient protection at a lower cost.