re: Poker & I need your experienced advice (bankroll)
While it seems very obvious, people do forget or ignore the fact that the way to build a bankroll is to play where you have a edge. Roulette, for example, is bad because the house has the edge. For poker, it's a matter of playing at a level where your skill differential balances out the cost of rake and/or fees.
80 cents in five hours is obviously a puny hourly rate, but if you look at it as 4 BB per hour, it's not bad. Also, remember you can make more per hour in different ways; e.g 2-tabling is more profitable as ling as your win rate stays above 2 BB per hour.
And as for the level you play at, for small rolls, I'm not a big believer in arbitrary guidelines such as having X buyins. The reason is that even if you lose it all, it's not that hard to replace.