It's a 29 unit park and has a lot of deferred maintenance repair ahead. 

I'll have to get that discount when I check in and present my military ID!

This week I AM going to start notifying tenants, past and present, so that they can decide to set up a payment plan of they want to avoid being reported.  

If you keep it as rental there are guidelines for not paying or deferring capital gains taxes. 

So what is it they want to see and what is the best way to present the data?

But if you follow the 4 "D"s of 1031 investing - Defer Defer Defer and Die, you'll continue using the tax deferred dollars for your benefit until death at which point your heirs inherit the property at a step up in basis. 

Yes if no other liens are present

That only deferred he taxes.

TY very much for your guidance, @Dmitriy Fomichenko.Lenders (at present time of Sep 2021) who do not initiate Non Recourse loans:1. 

It is not necessary to be present for the closing as that can all be done remotely.