It appears then that their goal is to temporarily stop paying rent and perhaps for portion of them, to simultaneously harm their "evil" landlord however they can. 

A planned Flip has caused a change in plans due to major basement issues. 

Before Covid 19 it was hard to find good contractors cause they were all busy.

Between this, the "normal" seasonal increase of home sellers in the summer (which, when combined, may cause a short-term glut), and the reduced number of buyers able to buy due to current economics, I think prices will go down before they go back up.If you want to discuss this further, feel free to Connect and/or DM me.

—Upon receiving a request for forbearance from a borrower under subsection (b), the servicer shall with no additional documentation required other than the borrower’s attestation to a financial hardship caused by the COVID–19 emergency and with no fees, penalties, or interest (beyond the amounts scheduled or calculated as if the borrower made all contractual payments on time and in full under the terms of the mortgage contract) charged to the borrower in connection with the forbearance, provide the forbearance for up to 180 days, which may be extended for an additional period of up to 180 days at the request of the borrower, provided that, the borrower’s request for an extension is made during the covered period, and, at the borrower’s request, either the initial or extended period of forbearance may be shortened. (2) FORECLOSURE MORATORIUM.

Would not taking the offer and the rental market souring cause you serious financial hardship if you were not about to rent it immediately?

If you truly find something in due diligence that couldn’t have been reasonably identified beforehand, that’s reasonable cause for renegotiation.

Has made several great suggestions that get to the root causes of why the function is broken.

I agree and that's what I was told which caused me to want to get more opinions and look into it more before making a final decision.

That is only going to harm you.