Hmmm... Thought of starting my post with this
" A successful man is a man who can make more money than his wife can spend. A successful woman is a woman who found such man."

By 30, adding in realistic values, i'd say 5k. Degree progs usually take 3/4/5 years, so grad at around 25. This dude has 5 years to improve his income. Initial income at around 2.5k, 5 years to double it. Reasonable?