co-host and my own paid account

Hello,

I am co-host on the account of someone who have a paid account. I've a basic (free) account. But now I want to have a paid account also. How can I do this? I can not upgrade, because then I get the accountsetings of the paid account from the other. Can I stay co-host on the other account and have my own paid account?

Kind Regards,

Angelique