For instance, one property seems to have an extra bathroom that is not listed in the county records.I plan to make some modifications, including removing a closet wall to expand a bathroom and taking out a kitchen island that contains electrical outlets and a switch.

I got a very good price on the building (about $25k per door), but it was a ton of work as in addition to tenant issues, there was TONS of physical distress (foundation repairs, sewer line and water line repairs, electrical upgrades, new roof, and apartment renovations needed for all units). 

I don't remember their names but people from the War College helped us redo the electrical and plumbing for cost which was amazing.

The system must be large enough to meet the building's annual electricity usage. 

Stay away from electric heating - this is a tip for all investing to be honest. 6.

Quote from @Dan Zambrano: Hey all,After thinking it over I decided to create a new thread.I am a small time passive real estate investor who has ambitions to expand greatly, first to $20M and perhaps maybe more. i guess I will give a little bit of background on my journey up to now.I am 38 y/o, Electrical Engineer by day, Architectural enthusiast by night.

I assume it has sewer/septic, water and electric and they 2 tiny homes are plumbed/wired?

Some of that has to do with things like electrical service being available in needed amounts for the types of structures that will be there.

roof on, framing done, pool started, rough plumbing done, electrical rough will start next Thursday, A/C install next Tuesday. 

It would be the same if the tenant goes on vacation and brings bed bugs home with them.