My wife and I are 34 with 2 kids in elementary school.

You don't have to have someone else there at the house you're working on - it can be a nearby neighbor that is home, or the city street crew that is working down the block, or even the (older) neighborhood kids that are riding their bikes around.  

Use the security deposit to fix any damage (if there is any) and give the check to her kids. 

If this kid is adhd or has any sort of disability and you use that as a reason for eviction you are looking at possible serious discrimination charges.

If I could go back to the days without kids, I would absolutely house-hack or live-in fix-n-flip!

Jie Check out this Midwest Jie,We feel like kids in a candy store here,Ohio, Michigan and Indianapolis are my top picks.Thanks and much success.

The work is taking a long time because he is trying to milk it until his kids go back to school.

Lol, just kidding.

Pay off debtsI don't have kids but you could also place any extra income in their college savings fund, I think it's called a 529?

They probably will have little effect, most people who rent an SFR either have kids, a dog or both, which can be difficult in an apartment.