I would be interested to know why you sent the report to the listing agent, if you were not going to use it to negotiate a lower price.To answer YOUR questions; if you back out of the deal they can re-list. if the have the same listing and just change the status to "Available" or make a new listing, that does not change anything. 

If you want to do your own brakes, replace your own outlets, cut your own hair and replace the plumbing in the guest bath then knock yourself out.

Be sure you have your funds ready and available to deploy for anything you place bids on.Accredited investor status is important when dealing with Reg D, 506(b) and 506 (c) private placement offerings.

For 2018-2025, however, the TCJA limits itemized deductions for personal state and local property and income taxes to a combined total of only $10,000 ($5,000 for those who use married filing separate status).

Would 300-350k get you another property that you could STR using that equity to not only buy another place but furnish it and have it guest ready.Sounds like you have options which is a great place to be.

The master bath and guest bath upstairs were not remodeled but they are in good shape.

I have an idea of which neighbor might have complained but we have gone the extra mile to make sure there is privacy and that guests are quiet and do not play loud music or party.

They would handle all the late night phone calls when your guest can't figure out how to get into the property because they didn't read the instructions (am-I-right).

I am a currently a licensed real estate agent in Maryland, I actually decided to get my license after a few podcast guests recommended it for investors. 

It sounds like the PM was doing their job letting you know the status of the property.