Looking at the job in their original application or move out packet will tell you loads about their money making abilities, and if they have something to go after.

Don't waste your time trying to build those massive lists because its honestly just a waste in most circumstances.

Be sure to read through the Education section above it is loaded with great information. 

It basically wastes contractors' time..

Our transactions are structured around a 3% load factor.'

If you don't have the means to close the deal they won't waste their time. 

Of course I understand he wants me to make an offer so he doesn't feel like he's wasting his time and there is some money on the horizon for his work thus far, but I'm kind of stuck as to how to proceed.  

Go to gosection8.com, register as a landlord, load up this property, then go to the rent comparison under tools.  

If the buyer's attorney has reservations about title, the buyer will back out and you've wasted your time and money.I tried to save a little money with them and wound up filing a quiet title action any ways.  

Worrying about buying your 5th property when you don't even have line of sight on your first will do nothing but distract you and waste time.