@Quincy Hill Sweet.

@Joshua Mitchell I am not sure if you already pulled the trigger on this property or not but it sounds pretty sweet.

Instead, locate a SFH with a separate income sweet/ ADU/ Mother-in-law unit already built in the property.

Other than that, what other advice would you give this lovely couple and their dear, sweet mom?  

If this is the case, it may not be as sweet as you think.

Sweet spot is to have leverage less than 75% loan to value.  

They're kinda the sweet spot of "already insulated, have ductwork for heat if not AC, windows are not completely failing and rotting out the house" for me, and they're the most available MFHs in where I invest. 

I think this might give you your answer on whether to buy and live in or to rent.  1800 a month sounds like a pretty sweet deal if you are comfortable there.  

You want that, and the lenders want to sell it to Fannie for that sweet sweet back end profit.If a hypothetical lender forewent that sweet sweet back end profit, that means you're making up for it, so maybe that means your down payment is reduced by 5%, but your fees/rate/etc jump up by, call it, 4%.5% towards equity is a better deal than 4% towards fees/points/rate/etc.

Especially, when you have partners who will constantly doubt your promises when you can't deliver on what you promised.It is not going to be a sweet deal if you get high-priced creative financing and then when you have two partners you have to share the spoils with.