How do I convince my parents to buy a Nintendo Switch?

Moin, I would like to buy a Nintendo Switch.

My parents are skeptical about gaming, specifically: my father is against gaming, my mother thinks it's okay. I have a PC and my mom doesn't want to buy me a console because she says I can play on my PC. However, I like the games from Nintendo and they can only be played on Nintendo consoles. I have enough money and would buy the Switch with my own money, but my parents don't allow me to spend my money freely. How do I persuade my mom that I can use my own money to buy Nintendo Switch + games and accessories?

Slime and say you buy them yourself you can't do anything more

That's exactly what I want to do.