And I may get multiple bids for the same work, like multiple paint bids, multiple roof bids, multiple flooring bids, etc.

The solar system adds no value to my property for rental purposes, and I may even be ripping up the roof & replacing it in the new year.Beyond sending a nasty letter through my attorney via certified mail, demanding the company come pick up their equipment, am I required to take any further action or fulfill any obligations regarding these contracts?

I have done this and then we lost half of our W2 income, then a big HVAC repair, then the ELOC rate drifted up from 4% to 10%, then a storm forced a roof repair sooner than expected.

Pro tip--make sure your exhaust fan in the bathroom is vented to the atmosphere--meaning out to the outside.....go out the roof or out the side of the unit or secured to an opening in a soffit vent grille off the house. 

They will do a slap dash job on a house that still has a bad roof and foundation in a neighborhood that will see zero appreciation. 

We have had tenants use everything from latex caulk to roofing cement to try to fill nail holes.

we just see new investors in the forums blown away when they hit their fix big capex - a new roof, a new furnace, a driveway repair, a couple appliances going at once. 

I hope you or someone is at least keeping an eye on your properties for break ins, squatters, roof leaks, temperature control, frozen pipes (if in cold climate), if you have a basement and sump pump goes out leading to water damage etc.I just talked to two investors in California that have let their properties sit vacant (no mortgages so paying property taxes and insurance).

In my area you have to strip the roof shingles at a minimum . 

Large basement and attic space, new roof and some of the kitchen is already torn out from the current owner. one bedroom does have a closet that will need built. plumbing seems fine, maybe a couple angle stops to change.