Also, double pane replacement windows are not difficult to install if you don't already have them. 3.

One property installed a American Standard 4ton 16 seer, silver AC in Aug-2022.

In Riverside you'll have to install a panel and meter on the ADU.

This painter previously corrected a poor drywall installation of 2 walls and painted with Sherwin Williams small drywall, which looked  good to my untrained eye.  

Lastly, when i try and call them to speak to my property manager 99% of the time I wind up having to submit a note in their portal and wait for a call back.As to to the new garage door that will be installed by the tenant, I wish they would be more involved, giving the tenant some options of companies to call, and to walk them through the repair process.Am i wrong in any of these thoughts or concerns about my current PM---or---do i need to let the property manager do their thing and learn to take a step back?

He will know if the heater is even installed correctly, safely, and to code.

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. 

When we did commercial construction, the one piece units were actually brought to the site during framing, placed into the room they were going to be installed in, and then the building framed around the unit.

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