This creates another problem- I'll loose contact with the potential investor. 

If you sell it, you would get some money now but loose out on the long term rental benefits. 

If you have cash you want to burn and can accept that you may end up loosing money on the flip.

One small bump in the road and with the lack of extra cash flow you might end up loosing your home and the rental house.  

What does he have to loose if he rips me off for my deposit?

The carpets are not worn or loose.

If you pull that money out, you may have to pay taxes on it and loose some of the value. 

Risk might not be worth loosing $3k.I’m in New Jersey and don’t have any reliable probate Investor’s as I’m still networking and meeting rei’s.

Whereas private sellers of notes may be able to offer non-recorded private information in some circumstances.I believe @Sam Shueh and @Christopher Winkler think you are asking for the later non-recorded data, and if so, it is likely you'll never build a good data set on which to turn ai loose, and whatever data you do acquire will be through hard earned relationships with note sellers, as they mention.If you are, however, just looking for public records data, then all the sources your mentioned will offer roughly the same data.

Really good ones are so rare that if an investor has one they don't want to take the risk of loosing them to another investor.