He has three options.(1) Pay off in full(2) get a partnership to buy more house units(3) get into a bridge loan or bank loan to be removed from an FHA loan

For 2 units; DSCR can go to 85% LTV or 15% down for purchase OR 75% LTV for Cash out in your scenario. 

Or you can just put it all into the reserve account, growing that to buy your next property and/or for future capex or vacancy/unit make-ready expenses.

At first, since mid-2020, the rent was late but steady every month with rental assistance.

Hi Greg,I have used Appfolio since 2009 and have about 1000 units on there plus Appfolio Plus.

I could easily train virtual assistants to handle these payments and have an app created for encrypting sensitive data for facilitating the transactions through financial service partners from my main line of business.

You can always do a two unit duplex for rentals that have two floors. 1 floor per unit.

What if you have an apartment complex with 20 units?

https://my.aarpfoundation.org/article/renter-eviction-assist...

We see mis-listed units all the time, but occasionally there's actually an additional one per the assessor.