So, if you planned to own it for 30 years you could be relatively sure that you will replace the:  plumbing, windows, siding, floor joists/piers, and roof (again) . . . that's not touching aesthetic/cosmetic things that will possibly be replaced along the way. 

Let's assume 1500 sf flooring in each unit. my area it is $6 sf to replace.

I have a headache pier and beam foundation SF home that ultimately required a $30k complete redo of the foundation and flooring in the beginning of April.  

I've had PMs send "technicians" to check a guest reported  problem that have resulted in requesting that I replace a dryer that just needed a $75 part, calling a $300 electrician who finds nothing even after I tell the PM that there is NO wiring within 10 ft of a guest reported "hotspot" in the floor (say what?)...

If the current rents are $1200 per floor and market rent is $1500 per floor, there will be some pain and suffering raising the rents, but LONG TERM the house has more value. 

Countertops and vanities replaced, cabinets painted, new flooring, new appliances and some new fixtures.

Add inspecting chimney, windows/doors, bathroom ventilation, paving (concrete, asphalt, etc).I recommend hiring a pro and getting his/her recommendation for termite or other pest inspections based on what the inspector sees in the property. 

House is divided in to one unit top floor, one on main and two units in the basement.

., are you going to use cinder blocks or poured concrete for the foundation?)

Account ClosedThere's a limit as to what a handyman can do, certain jobs will require professional plumbers, electricians, flooring guys, etc...