For example: Landlord will pay for electric, water and sewer charges up to $100 per month.

Labor/material are going to be different and need to factor that in4) new roof, new HVAC, new water heater, ac panel, replacing plumbing to PVCThese are very variable, if you are getting this from a licensed guy to do it and unlicensed.. is it a big shop or a local shop doing it, is the GC doing it they will put some money on the top so it will be more money5) framing (creating new bedrooms or baths)I would get all these quoted from a good couple of licensed guys and unlicensed to know your numbers to cents

doors need to be power washed, gutter needs to discharge further from foundation (deck is uneven and breaking, possibly due to water erosion?)

So thankfully with the help of my mentor and his crew of Six, we were able to complete all prep and are amidst our final pass for sanding floors before our water-based polyurethane. 

You mentioned that you've been paying water / sewer for all 4 units. 

Wood Floors not sealed, tile not properly installed and grouted, cheap flat paint that the tenants can't wipe finger prints or food splashes off, countertops not caulked so water gets behind causing water damages, the cabinets were painted over not replaced the list goes on and on.

and deal with power lines, water lines and sewer, maybe seal the well. 

What type of MEP work are you putting into the design for getting the sewer, water, power, and internet (assuming you're not extending gas) to the inside of the building? 

@Lorenzo LopezPretend a map of Boston is a pool of water.

Lot rent is $365 and includes water.