If it cost you $5000 to install, use that as your starting point.

If you had a default interest clause in your promissory note and didn't enforce that and they still made monthly installment payments, for which you accepted each time, then you are in a sticky situation to require additional extension costs. 

Installing a GFI at the top of each circuit is ridiculously easy, as you say.

Cutting tiles can be a challenge if you have angle and corner pieces but a basic install isn't too hard.

Insulate, add electrical, mini-split ac, and possibly plumbing, as desired, drywall, tape and paint, put built-in cab's on one side if you want, hang the tv, speakers, etc, install bi-fold/multi-fold doors on the side leading to a patio, and replace the garage door with an insulated one keeping the track and removing the motor, or install a carriage type garage door into the existing garage opening.

Here is the specific language from Assembly Bill No. 68:a local agency, special district, or water corporation shall not require the applicant to install a new or separate utility connection directly between the accessory dwelling unit and the utility or impose a related connection fee or capacity charge, unless the accessory dwelling unit was constructed with a new single-family home.If the Planning Department is telling you that you need separate utilities and you're adding an ADU to a lot with an existing SFR, refer them to the above language from AB 68.

I added more cabinets in the kitchenI added a handrail to steps in the rearI had new cement poured on sidewalk, porch and drivewayI added new storm doors to all 3 doorsI added new cordless, faux wood blinds throughout home (Home Depot installed)I repainted and repaired detached garage Lessons learned?

As these new nvidia GPU's get ordered, built, shipped, installed, and brought online.

., credit cards, installment loans, mortgages) can positively impact your score.

I am thinking about installing submeters for the property.