The lease has only one tenant's name and says up to 5 children under the age of 18. 

Looking for signs of leaks is my #1 reason for annual interim inspections...I always check under sinks (taking pics) and also take pics of ceilings in general, especially bathroom and kitchens, and floors in all the suspect areas (toilet, tub, laundry, sink base, under-counter water heater, etc.) and depending on the apparent age of the unit, I try to get a look at accessible window sills if this is an issue I have any concern about.

In 10 years he will easily have 5-6 properties effortlessly by the age of 30.

Called the contact they gave me for employment verification, checked out.

Age of the house is a huge factor.  

Another apprentice that i have been working with, introduced me to this forum site and i was just wondering if there was any advice in investing for someone my age, doing what I'm doing.

It's great to see you are thinking about building wealth at such a young age.

I'm getting to the age where I realize some extra SS earnings can't hurt!

Welcome to BP @James Crowell I wish I started at your age.

Size, age and location determine insurance cost.