When you put it that way, it sounds unsustainable!  
Seriously though, it's a little bit of an exaggeration - maybe average $90K?  Anyway, my team is not really very good, but I have some money, don't really need to build out my arena anymore, get good merchandise revenue, don't have viable trainees anymore - so I think it would be fun to field a team that can utilize most offenses so that I won't be predictable.  
I'll probably sell off someone later in the season also.