It consistently achieves 95-100% occupancy as a short-term rental, with nightly rates ranging from $350 to $550, generating substantial cash flow.

This is not something you will get online you need an attorney to draft documents and it is just a matter of whether you draft them or their attorney drafts them

Send a letter giving them your/pm's contact and a detailed explanation on how to pay the rent (Helpful with older residents if you are going from check to online billing.

I may be wrong in my understanding of the real estate code of ethics outlined in the Arizona state statutes, and everything else I've read regarding real estate transactions, but as far as I understand it the original agreement to sell is null and void due to the nondiscolure committed by the real estate agent/broker first in the fact that he signed the agreement to sell as the buyer, misrepresentating himself as the agent and stating he had a buyer/investor and Secondly because the agent involved should not sign in representation of the buyer but may only accompany the buyer to the signing (it was done through docusign, I signed first and then was notified that the buyer had signed and downloaded a copy, I didn't look at who the buyer was until just last night).

Lots of material online.  

I also did some investigating online and see the renter has a tendency not to hold down a job.I offered asking price (fair market) because it was the sellers bottom line and the fact there were already tenants renting.

I think you are answering your own question here - if you can't find reviews or much info online then....

Or maybe the ESA letter is from a bogus online source that isn’t acceptable.

I agree with the above that Quickbooks Online (QBO) will work for you.

The address was submitted to their red book and now shows up online as official address when I try to ship items from Amazon or similar websites.