If positive, it's generally treated like income or offsets the liability for that property to $0; this is highly dependent on the circumstances.

Unfortunately, STRs as single family homes are still considered residential assets.

I gave up on their more "advanced" analytics a while ago unfortunately. 

@Salome Ditmars there are many out there—but unfortunately there is no centralized repository to locate them.

I’ve used seller financing as both a buyer and a seller and it can make a lot of sense in certain circumstances (for example I used it as a buyer when I reached the maximum number of conventional loans I could get, and I’ve used it as a seller to both increase my net proceeds (due to collecting interest as “the bank” in addition to the sales proceeds) and to lessen my capital gains tax hit by spreading it out over a few years).

Maybe your situation is different and if you don’t feel comfortable in the neighborhood then this may be a moot point anyway.As for FHA, my understanding is that you must intend to live in the house for a year  it sounds like you did intend to, but due to unexpected circumstances- lead exposure and unexpected unsafe neighborhood- you have to move.

Unfortunately, I couldn't purchase it this year but I just need to keep saving, analyzing deals and at some point I will be able to purchase it. 

Unfortunately with one of the units being in the basement they couldn't use any of that square footage for the comps calculation which killed where I thought I was going to get it appraised. 

Unfortunately, December is probably too late for this, as explained here: https://www.biggerpockets.com/forums/51/topics/1220969-expla...  

I have experienced some of these very circumstances, and in California.