You might make it easier on yourself if you figure out what your entire bankroll is. By entire BR, I mean all the money you have for poker no matter where it is, not just the amount on the site where you play. Since you seem willing to deposit more, using this definition, only part of your BR is on the site.
When I started, my BR was $150. I was not going to use any more than that, ever, so if I had lost it, I'd have been forced to play freerolls
. I made it simple and clear for myself by putting the entire amount into an e-wallet. When I deposited parts of the money on a couple of sites, my BR was still $150; it was just split up.
You can play at the lowest stake level with any BR. It's the exception wou don't need a minimum number of buyins.