Its possible to build a Bankroll from 0$, i think to get 5000$ Bankroll from 0$ is a little unreal. Ok with much luck as anyone on this Planet .
I build a 40$ Bankroll only with freerolls and microstakes cashgames in 4 month but crashed it in 3 days of Rushpoker.
But since i paid a little in my Bankroll it gettting better and bigger.