I reported the “loan offer” to authorities (more details at the bottom).

I’ve done some easy ones such as becoming an authorized user with someone that has good credit, and I also plan on attending some real estate meetups in my area once covid starts to get more tamed and I don’t plan on stopping reading and learning about rental property investing.

This has resulted in a backlog of projects that have been authorized but not yet started, which is now the largest backlog in nearly 15 years.

Or alternatively give us authorization to send a key with the contractors. 

Will you have work authorization to earn income and pay the mortgage?

Alternatively, you cold have a management agreement between you and the LLC, which authorizes the LLC to enter into leases on your behalf. 

Then I'd say - I don't want to do that and I don't want to put your voucher at risk (if they get evicted and as long as you notify the caseworker/Housing Authority, they should lose their voucher until you're paid). 

Is there any way that the buyer could Authorize you to speak to their loan handler to confirm that it is getting close to the finish line or at the very least it’s really in the works?

Every area has a housing authority. 

By contrast, EAs are IRS-authorized tax experts, so a single one can help you regardless of location.