These kids already spent their house money on their education.

@Nadir M.Two additional thoughts:1) A central boiler is a cost trap for owners.

In addition you'll have to make the monthly interest only payments.

There is additional reserve requirements when buying more than 1 unit, so get up to speed on those so you are prepared to have those in place at the time of closing your loan. 

These are professionals with additional training and a stricter code of ethics.

Some random kids from the nearest high school?

basically Houston doesn't believe in general licenses. how to hire onehttps://www.biggerpockets.com/renewsblog/2015/03/1...as stated above try to find a bonded/insured contractor.managing your contractorshttps://www.biggerpockets.com/renewsblog/2010/04/1...additional tiphttps://www.biggerpockets.com/renewsblog/2015/05/1...paperwork to help make sure you don't get screwedhttps://www.biggerpockets.com/renewsblog/2010/04/0...Thoughts?

One flat tire, one sick kid, one broken leg.

It's not in my current lease, but I will have several units open over the next month, so it's still an addition to my lease that I might want to add.

And also my father’s back is damaged because when kid he almost killed himself hiking.