Check Craigslist as well in your area. You're bound to find awesome deals on there. Instead of buying a brand new freezer from Home Depot for over $250, I decided to buy a used freezer. Picked it up for $50. That saved me enough money that I was able to buy a 2-keg system from Midwest and I was still under my original budget for just the freezer alone.
I think that the wifey would allow you to get a bigger freezer if you can prove to her that you're actually saving both of you money by buying a larger, used freezer! Just wanted to let you know though, after you get into kegging, you'll want to brew more and more beer. It's amazing how quickly the stuff goes when you can just go to your freezer and pour a perfect pint anytime you want to.