I once spent all night pumping 3 feet of water out of a basement, in a monsoon, using a DC pump attached to my truck battery because there was no electricity to the house and the sump pump couldn't work.

Energy (propane/electric) costs annually are atleast double to triple for an indoor heated pool, unless it is a small fiberglass insert which guests detest as they are just a little larger than a hot tub. 

Before you know it, you will catch the real estate bug and will want to own all the homes you can! 

You won't sell it if you didn't get permits as most municipalities require you to get a CO or the buyers will do an OPRA request and see you didn't pull permits.If you did electrical or plumbing without a permit, the walls will need to be opened up to expose the work.You won't be ready to sell in 3 months.

.- Both boilers installed new 2017- Both electric panels upgraded 2015  - Shared Backyard access for bottom 2 units- No Parking, No Central Air- House built before 1900- Roof about 20Yrs old- Assume Fed cuts rate at least .25 point later this year Any thoughts would be appreciated.

As an investor how does $7/month electric help you?   

They also said i needed to account for common space electricity?

at a bare minimum, new paint and carpet/plank everywhere and changing out all the cabinet hardware, electrical covers, fresh light fixtures, etc. will make things look fresh and clean.

This particular unit is an ADU and utilizes my electric/sewer/water so they pay portion....

I assume these areas have strict zoning, permitting, and design codes, along with requiring state licensed contractors to perform electrical, plumbing, and HVAC which would increase costs.