I tried to stay out of the way, but I had to stop several things from being done wrong—spaces between kitchen cabinets that were too small by at least an inch for the appliances to fit, a walk-in pantry being built that was too narrow for anyone but a child to get into.

Quote from @Andrew Syrios: So basically note investing is really trashy and you're looking for a continuous stream of income but instead of alimony or child support it's loan payments instead? 

You’ll have to be very lucky or willing to buy a problem child property and/or neighborhood.  

My wife and I have a child as a member on each property(last man standing gets it all). 

I went through the same thing a while back where I ended up with over $100k in debt, overdue mortgage payments and child support to pay.

@Lauren Cutchen Bought a house where the sellers child had scratched his name into the stainless steel fridge door.

I have lived in (with a small child) and own multiple pre-1978 homes that most likely had lead paint in them.

As for location I'd like to purchase property I'm undecided; wherever isn't going to give me a headache :)..

The adult child would not likely be able to afford to purchase in the neighborhood where the parents live.

Just think, if that was YOUR child, living with vermin.