That's about what I'd like to have at some point. Right now I've got an 11'x6' in ground planter (with a 15" high flagstone wall around it) and a 8'x4' raised box. This year I'm supplementing that with about a dozen 5 to 10 gallon containers. I've got two blueberry and two raspberry bushes outside the planters and I'll probably be able to put two squash plants directly in the ground near the beds (and cross my fingers the dog doesn't dig them up) but that pretty much takes up all the space that my soon to be wife is willing to give me.
I did buy a dozen wooden wine boxes from a local liquor store and am gong to hang them off the rails of my deck, so all herbs are going to move to nice, orderly containers this year.
In our current house I don't think we'd ever be able to hit a sustainability level garden but over the course of a year it probably saves us many hundreds of dollars in produce cost. I figure a packet of tomatoes seeds that I pay 3.95 for will produce 25-50 dollars worth of tomatoes in a season, so that's a good trade.