I will be selling my primary residence and I’ll have about 100k to play with .

I've played around with Reddit a bit... but not with regard to buying ads.

Then, you can go and play around with some variables to see what effects what and how much on the spreadsheet. 

They might, but have no duty to do so as both parties know the senior survives.I can state with certainty that's how it would play out in California.

Non-bank lenders underwrite to the property's cash-flow (and most don't have an income requirement at all, it just plays a role in the rate you receive) and they do not look @ your tax returns, personal income/DTI.

So I would take a few minutes and layout your long term goals and how you want real estate to fit or play a part in your goals. 

How does using an FHA play into that?

The thought is I could keep the same good tenant instead of gambling on an unknown tenant, the tenant gets continuity to their business instead of finding a new place for likely similar rent, and I get to increase my NOI for sale or refinance purposes.

No fuss, and no issues.Furnaces are plug and play.

Personally I lived in Seattle now Hawaii and I saw the light... need cashflow to eat (although i do admit that appreciation will make you rich)It could appreciate but I consider that gambling.