When my teenage daughter gets text messages and phone calls all the time about our rental properties, it gets a little annoying.

You are running a business not teenage friendship circle.

It got worse when my sisters were teenagers.

A small family with a teenager would absolutely want a second bathroom.

I'm not paying $65/hour for someone to patch and paint a wall, not when I have teenagers I can teach how to patch and paint a wall and make it look good when they're done.) 

If you are having a teenager from the neighborhood do clean up you are already paying 60-70 cents on the dollar. 

Since we allowed our teenage/young adult children to be part of the deal, they've been part of the renovation process - learning how to demo, budget, and get their hands a little bit dirty :) It's been a fun project and we're now hoping to turn it into a short term rental.

The tenant's teen age son had serious anger issues and broke back into the unit, got drunk and they set off fireworks in the unit and got arrested.

For real estate, Set For Life by @Scott Trench is the one I generally recommend as a starter, and give as a gift to friends for their teenage kids.

Days later, a wonderful family with teenagers moved in next door.