I always UW a deal so that it works as a LTR but then I can have options with MTR/STR in that market.

Hope this helps anyone else considering this funding option.

Selling outright: depending on how much profit you've made, this may also be an option (speak with an accountant).

I'd suggest reaching out to a few different lenders to see what options are available to you.

Another option I’m considering is finding a mixed use building with residential rental space above and do a single tenant commercial space below.

One other thing to note about the h/st Trinidad corridor that often gets lost, its most of the area isn’t that metro accessible, when the city was growing and they hadn’t fully built out navy yard/the wharf/noma yet that was ok, but with the city shrinking and other newer more appealing options I do worry that the metro accessibly plus the age of the neighborhood will be a real long term issue.

I don't have a guidebook through them(or at all), but if I were to create one, I would probably use touchstay or another 3rd party option like that. 

I ended up offering it as a lease with an option to buy.

And in most cases it is still a very good option for a home's plumbing system.

There's no way around the 20% down minimum for an investment property--creative options like the piggyback mortgage are only for primary residences.