Season Ticket Advice

So over the last few days it has dawned on me that I should look into buying football season tickets. I graduated in 2009 and am trying to figure out my plan of action. I live in DC so can probably only attend 2-3 games per year, but I mostly want to get season tickets so that I can have really awesome tickets when I'm older that will help me brainwash my kids into loving michigan. From what I've gathered you have to donate a fair amount of money to get off the waiting list. Does anyone know how much/how long this usually takes? Is it worth going on the wait list now, or should I just wait until I'm older and richer and can just donate a big chunk of money?