Lol My question is: where do historical residential housing records/building permits get filed other than city hall? 

That is why I posted - hoping to find out where exactly my analysis is flawed.

If its Paying for leads that is fine, then just some advice on how to navigate and where to look to generate them.  

$$ Where are my Pennsylvania people at?

Now here’s where it get CREATIVE and INTERESTING.  

The place is gentrifying since people cannot afford to live or invest in the New England area + New York City Metro, Northern Jersey, Southern Florida, California, etc.People are then targeting for areas where people can follow the money and see where the next gold mine is. 

In scenarios where occupancy falls below 80%, equating to approximately 2-3 months of vacancy, the likelihood of encountering negative carry increases significantly.

I live in a state where this is easy and inexpensive to do.

I'm saying be careful where you put it, because if you make the wrong choice you could lose your home due to not being able to pay the taxes, etc...e.

Most of your closings are going to come on the followup, and that's where most note players fail-- they expect to get results on the first mailing.