It’s not the most conventional inventory, but there’s been a fairly consistent pipeline of retiree buyers from what I’ve heard.

Finding something on Zillow and taking a swing just doesn't work unless you can pay cash for a property that does not qualify for conventional financing. 

DSCR loans will not be advantageous when compared to conventional loans.

9) adding multiple ADUs or adding an ADU to a quad looses F/F conventional financing.

I expect conventional to be lower than DSCR.  

Great idea, although conventional and FHA renovation loans are somewhat of a pain to qualify for.

HUD and Agency financing is another beast compared to conventional or non-bank lending (Secondary Market).

and the entire conventional wisdom of the 70% are there any people who don't really use it all and have found out their ways of making the numbers work Like adjusting the percentage based on the market. 

Should we do a conventional loan?

Typically you aren't buying a fixer upper with a conventional loan.