FHA might be a little tricky with this one.. no heat source in the bottom unit, chipped paint on the siding, and deck needs some work.

Acquisition Costs: $32.5k (down payment) + $9k (closing costs were reduced $2.2k due to negotiation) + $49k rehab => $90,500Rent Roll:Basement Unit: $725 (renting to a lifelong friend, so I reduced; includes electric, water, and gas) [840 sq ft, 1 bedroom]Unit 1: $2400 (includes electric, water, and gas) [1,005 sq ft, 3 bedroom]Unit 2: $1750 + utilities [805 sq ft, 2.5 bedrooms]Total Gross Rent = $4875Monthly Expenses:PITI: $3592 (includes PMI)Water: ~$110/moGas/Heat/Electric: TBD, I've only had it rented since mid-October and basement didn't get occupied until Dec 1.

If I have a heating system go down, I have the money to replace it rather than out of pocket.

Do you use electric heat or gas heat? 

My guests blast the AC during the summer and crank the heat during winter leaving me with $300+ electric bills.

It depends on who is paying to heat the water. 

Currently it is oil heat.

Is there a heating vent in this room or a door that shuts it off from the rest of the heat source?

That said you really have to consider the location/area the property is located in as well (ie. extreme heat, severe thunderstorm season, heavy windfall, etc). 

But the brother or the son rather gave me a literal laundry list of things that needs to be done to the house such as the roof has leaked into the attic and then cause structural damage behind the walls also that there used to be a oil tank where are there currently is a concrete slab next to the house that was used to heat the house I hooked up to the furnace but now it's only a gas furnace but that doesn't even work and they're worried about turning it on because it does leak and you can't really open up the windows to vent it out except opening the door itself and getting out any fumes that would stay in the house.