I found out there is a current mortgage, talked with the company, but they won't give me any info because I'm not authorized. 

Even if they do, you have proof the house is yours and you are occupying it with keys to the door, so the police won't have the authority to evict you.

Does he have work authorization ?

Four units at $65 on MTM leases and two units are rented to the city housing authority at $700 with annual leases. 

I have a clause that authorizes me to contact that person in case of "death, incapacitation, or incarceration" and work with that individual to coordinate removal of belongings, payment of rent, or even a refund of deposit.When someone dies alone, there is always a police investigation to ensure no foul play.

I would also recommend you reach out to your local county housing authority.

I can pre-authorize an amount and if the expense is below that, the vendor can do the repairs without talking to me live4) Urgent maintenance issues - say a pipe breaks, or tenant is locked out.

In most cases planners won’t be around to help so your supervisor needs to be able to solve the problem himself, this means they must both understand the plan (the why behind the what) and believe that they have the authority to change it.

Who markets the property, sets the rent rate, signs the lease, authorizes maintenance, etc?

The Jackson Housing Authority is responsive and supportive.