There always has been activity in the Delaware Basin, but it is ramping up (especially since the Alpine High discovery).

For some it can be, especially if they are ok with investing out of state.If you’re an accredited investor there is an investment product called a DST (Delaware Statutory Trust) that might be beneficial for you to learn about if you decide to perform a 1031 exchange. https://www.biggerpockets.com/blogs/7993/48972-set...

Based on your location, you might look at the Delaware County subgroup, the Delaware State subgroup, and the West Chester subgroup; you might also look at the Oaks subgroup, although that is farther from you than those others i mentioned.

By giving that cash back to the bank (de-leveraging), you no longer have it available to you.

There might be water/sewer/trash bills unpaid...but these would be de minimis.It is too late to contest for this year's property tax, but not a problem as that is paid up.  

BP - Any Delco investors/contractors work in Aldan boro before? How difficult is pulling of permits? I have heard stories that it is very difficult to rehab a home in that section of Delco. Some GC/contractors will no...

With proper and advanced planning you certainly can structure an Exchange so that you have the replacement property lined up and ready to be purchased prior to closing on your sale.Another option, if you do not want to actively manage property or you want a "safety net", would be to identify a DST (Delaware Statuary Trust).

@Bradley De comarmond provide signed leases and rent rolls to the appraiser. 

Basically, arrive at a way to de-risk the deal closing for the seller.  

If the address still doesn't work then chances are it is in a different town that borders the one you were doing it in.