I don't have near as much stuff as you. I've only done the first 2 levels.
I'm on the stage 3 of the Street Thug and on the 2nd stage for the Associate. haven't done any of the "high level" ones yet. so I haven't had to buy anything super spendy.
Plus, I've done a lot more fighting, I just got 150k off fighting one guy 5 times.