Parents make the rules when you live under their roofs. I could give you a long list of thing I wanted when I was living under my mother roof. She said no, and it had zero to do with money. As everything I want I could pay for.

When I moved out & got married the first time at 20 I was incharge. No my mother was not a bad person, she just many time said no because she provied roof, food, medical insurance, laundering of cloths, etc.