My mom charged me from 18 because of how much she was getting before. My dad passed away in military service so my mom was getting checks from the VA for me and my sister until I turned 18. At 18 she lost that, and thus rent was due
I was able to live rent free with my parents until I was 25. I just took my paycheck every week and put it towards my loans while in college. By 27 I was debt free with a bachelor's degree.
When I was working, I was paying rent but it was much lower than if I had been on my own. Plus it was a flat rate so I didn't have to add utilities or even car insurance.
Now that I'm not able to work I give them my food stamps. So I still contribute just not much unfortunately.
But yeah, I am thankful that my parents allow this arrangement.
My options were paying for my tuition or paying rent. If I was paying tuition. I got to live for free at home. 6 months after I wasn't paying tuition rent kicked in..... I moved out instead of paying to live in my mom's basement. I'm very very grateful for that arrangement, otherwise my student loans would have been significantly higher.