@Jake Thorpe  I did NOT say that I bought all those, only that I saw those properties offered for sale at Tax Sales that I attended.

You've signed up for one PIA if the owner is still in the house.One way to tippie toe into this is to hook up with short sale agents and start working with them offering to door knock the NOD folks. 

I have had previous requests for help with this situation, and that's the advice I consistently offer.

That's your maximum offer - if the seller doesnt like it, they can kick rocks. 

It's probably going to mean paying points at closing, a high rate, and a serious pre-payment penalty (like 5 years). 

Sellers had multiple "accepted" offers and all were placed in interpleader accounts. 

Some of the materials we choose and asked him to pick up (such as flooring) he replaced with low quality materials, I assume to keep more of our money for himself. 

Quote from @Vikas Jain: Yes, I have already seen the buy-in, im less concerned about that part of it, but just want to make sure its legitimate (plenty of opportunities where buyin is high but it doesn't always mean the product is good, just been burned in the past by others so trying to do better due diligence this time around)Their success rate, as of now, is 100 percent.

However, rezoning now could still offer some advantages depending on your long-term goals.

The quality of answers to your are directly correlated to the quality of your questions asked.