I don't see much activity here at all.

I really doubt he is an active gang member, I've been talking with the family, he and his wife are both Senior Citizens, and as far as his possessions go, he left the place (and the family) in pretty bad shape...

If you tell them up front that you require a minimum income of 3x the rent, a credit score of at least 650, and that you will conduct a credit/criminal background screening on every adult, that should weed a lot of them out before they bother applying.

I'm an active investor in Reading and know the area well.

He is a moderately active member here and I would trust him to do an inspection for me.

People are much more likely to tell you, "We'll think about it...we have a couple more places to look at", than they are to tell you "I have a criminal record/bad credit/eviction record/whatever and don't think we'll qualify for your rental".Of course, if your rentals are overpriced, and they are able to find comparable housing for less money, then that's another possibility as to why they aren't coming back to complete an application.

If you are unlicensed, then you could possibly run the risk of broadcasting your unlicensed activity to the world with your ad. 

He has not been very active here on Bigger pockets for a while, but you can see his posts by searching for his account here and then you can see his posts Aler

motion activated high pressure sprinkler

Also, real estate syndication's are a great way to earn solid returns while not having to actively do anything.