Why not pitch it to any interested party that will pay you an assignment fee? 

First of all from the developers perspective this is really nothing more than a reverse exchange where an unrelated party takes title and holds it until the developer completes his sale and is able to 1031 into that new land. 

That said, you'll never know where you stand until you talk to a few people about it.

As it stands now, it collects water and tenants will often use it for extra parking.

(LOL)Most people forget that the first L in stands for Limited, not No "Liability"

So yes it can be held "hostage", In fact that's exactly what leases are for to hold two parties to terms that both have agreed to abide with.

Seems like a huge opportunity for all parties.

And it's also good for neighborhoods.As far as the financing part I am afraid you went way overboard with your LLCs and DBAs.

If you go with a 3rd party...start slowly with what you can afford to lose.   

The fun part is keeping a second box always updated.thanks for your input!