IF however you want to generate leads or traffic to the website, SEO(search engine optimization) becomes quite important. 

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.

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

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.

.- 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.

Find architects or designers, engineers of all types, general contractor, etc. to design the project, and know how to keep the design where it's functional, cost effective, but has appeal.

Would you ask your auto repair shop to reduce their price before rebuilding the engine on your car?

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

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.