How good of a poker player should I expect to be if I only play for a couple of hours a week maximum online (mostly at $5 or $10 NL) and the occassional home tournament?

I read this forum as much as I can and I have read most of the highly recommended books. I really like playing poker, but I can't find as much time as I would like with the other activities I have. I am not a great player by any means, but I do consider myself better than an outright fish.

Should breaking even be my goal, or is that unrealistic?