- Since a portion of the house will be a STR, can I bonus depreciate the solar panel installation?

I presume it would be advantageous for my in-laws to pay back that $250,000 in multi-year installments to limit their capital gains tax liability? 

Once was installing a new microwave. 

Technically I believe you're covered if there is an accident because they were correct at the time they were installed.

The electric company installed the new meter for free after giving me a credit for adding laying the conduit required for the 200amp to 400amp upgrade.As for the 1/2" (non fire code) gyp, my understanding of the code is that a 1 hour rated assembly is required between "dwelling units."

I have a tenant that wants to install a fence in the backyard of my property for their dog.

Tax deductible improvements such as drainage tile, terracing, irrigation can significantly improve the productivity and the value of the land.

New LVP flooring upstairs to replace all the carpet, new cabinets and countertops in the 2.5 bathrooms, new fiberglass shower in the guest bathroom, new walk in shower (tiled) in the master bathroom, next lights/sinks/faucets/toilets/etc in all bathrooms, new paint on kitchen cabinets, new pulls on kitchen cabinets, new ceiling fans throughout, and fresh paint throughout.

I owner-financed a small property in Ridord, PA that is under an installment contract or contract for deed for 15 years starting Sep 2015.  

Whenever possible we do not install a storm door, unless you are in the open on the west side of a house with modern doors it is not really necessary.