However, a $50.00 bankroll is too small to be at .25/.50.
I disagree. My starting bankroll at PR is never more than 20 bucks(and it's usually 10). I've got the microlimits there dominated. On multiple occassions I've turned that 10 or 20 into 200-300 bucks.

I take my share of beats and bust outs...but the game isn't that hard to beat at this level.