Your exposure is building over something and then having it torn out for any remediation purposes. 

You could estimate 6.5% of the value of the home going towards the costs of sale, meaning something like $33,000 of the $500k would not be taxed as a profit, even if you crossed the $250k/$500k threshold.So, factor in your mortgage (if any) and your costs of sale to get a more complete picture of your exposure.

My main concern now is not only the covid19 exposure by her bringing guests over the house AFTER the fact that I requested her to cease the guests. 

A good insurance policy as that cover the majority of your exposure - I always set up insurance on each of my investments.

The outside video may break public exposure laws, which is what they charged her with for the library incident. 

I am getting a ton of training now, and look forward to getting more exposure to other views.  

I feel it would be best to manage the property myself at first for maximum exposure, although given my busy work schedule, I worry that this might be a mistake?  

you sound like you've had success real estate investment, so give yourself a hard money goal, and reinvest int yourself doing what you know. try a method you haven't done yet so that you gain valuable exposure to other real estate investment vehicles (storage units, commercial, specifically high end, or subsidized housing, etc.) good luck!

I've always said it takes all three, a basic formal education, exposure to ideas and experience in doing.

Most folks here can't define "market value", but if the definition is met as to market exposure, time on market, no seller concessions, etc. what you paid for a property IS the market value, there is no guru junk of buying under market value.