Limt or No Limit?
Anyway, BB/100 is better used to gauge winrate in limit games. It's more accurate and consistent than $/hour stats. 2BB/100 is considered very solid. It's kind of been made the benchmark (Right or wrong) for limit players to shoot for. If you're making anything above 0BB/100 over a substantial amount (50k min?) you're doing a nice job. Because, the fact is, there's not many who can do even that.
BTW, at 6-max, you can see 100 hands/hour on most tables. So $4/100 hands on 4 tables is $16/hr. Not to mention the rakeback that serious limit players get and you're making even more. Think about the crazy bastards who 6-8 table!!!
Doesn't seem like much, especially for youse kids.