If the son keeps behaving like he does now, he can stay for a while.
His little sister turned 5 last month, I do not know how many years I can keep up with her. LOTS of energy (to put it nicely)
I lived with a couple of girlfriends that had their own places once I was 16 and could drive.
Pretty much kept clothes, extra vehicles, and jet ski at Moms for a few years.
I had what I thought was the best set up going for a few years....
Then a few months in one of those $hi+hole apts. with a buddy. SUCKED.
We flew out of there and I moved out of town to a new job and got a pretty cool apt. in a complex.
Then back to Grand Rapids for a better new job and a pretty happening apt. in another complex for a year.
At 21 bought the house on the lake that I still live in today.
Maybe I will get everything done on the list of remodel/repairs I wrote when I moved in one of these days.
It has only been 22 years now.