They had a loan request for $3 million.

Also, the case workers were taking forever to process RFTAs, only to request lower rent in order to approve - why deal with this when there is strong demand from qualified non-voucher applicants?

(They requested 24hr to review any offers).

Post a letter on each door letting them know of the new ownership and providing information on how to report maintenance requests, make rental payments, more - if any of that has changed as well. 

There are services which allow them to complete the application themselves online; some services even allow tenants to sign a lease with you online using the same platform (and offer other tools like online rent collection and managing maintenance requests). 

I get to pick who I want to work with, I set my own hours, I never have to request off for vacation, and I work from home.

Generic tour requests are pretty normally dead ends for me.

Mail your complaint and documentation via Certified, Return Receipt Requested to the Managing Agent/Account Executive from the management company that the HOA has contracted with.

Then they ask me to sign the contract and send the fee requested.

The landscaper claimed he had them on a list to come back from a year prior when they was never requested.