it is POSSIBLE to become a success with 5k. it is more likely, assuming you have solid discipline and a decent methodology in futures trading vs. stocks, because the leverage is much better etc.
i have taken 5k accounts and solely using dow futures, brought them to 15k several times over. i take profits out and start all over again. this is using a scalping type methodology.
but i have found that GIVEN a good methodology and discipline, it is MUCH easier to trade when you are well capitalized.
MUCH easier.
trading with 5k causes you to sweat every tick much more, and like i said DISCIPLINE is key, and it is harder to be disciplined when one bad trade can take out a siginificant portion of yer account.
also, a larger account size allows you to be more flexible with how you scale into and out of trades, allows you to use multiple methodologies etc.
if one methodology is doing not so well in a market enviroment, another might be much better and vice versa. if you use more than one, you decrease your volatility in you account balance, and it works very well