-first aid is key, especially on leveling melee
-pick pocket anything you stealth by. make a macro for your opener with pick pocket. it'll add up over time.
-don't buy unnecessary stuff off ah. might want to pick up a couple green cheap weaps (5-10s) to get you going.
-don't buy all your spells. you don't need kick rank 2. keeps money in your pocket.
-since you're herbs, stack up on swifthistle. either save for when you're 60 raiding or sell it / make thistle tea depending on what sells better. at lower levels, swifthistle is about the only herb that sells "well" maybe briarthorn depending on server. goldthorn should be a decent profit as well until you are able to get the late game herbs.
made a rogue alt and did all this, but didn't give any gold or help from my main just to see how it would go. currently lvl 30 with 160g
it's doable