I know you're heard this before but you'd really be surprised at what you can gather up around your house to sell on ebay.
I did this two years ago and it paid for all our accomodations and a few meals at Disney. I started out with a few things, paid the one nights deposit which motivated me, sold a few more things, paid down another night, and so forth. I sold a camera, an old Nintendo game, baskets, vhs movies, toys, some of dh's fishing gear, a few ugly framed prints, just junk stuff that we haven't missed at all.
You could check around with friends and family to see if anyone wants to share a pool home. We stayed a week in one once for about $235 after it was split 3 ways.
If you go to the villa sites where you put in your criteria and wait for the owners to e-mail you back, some will give you a great deal if they need to fill the time slot. We just got a 5 bedroom house for $450 because the owner gave us a break for only needing space for just the 3 of us.
You can also save money on your meals this way, and if you're driving, you can buy snack stuff ahead of time, just a little at a time during your regular grocery shopping. We bring tons of bottled water, stuff to make margaritas, cereal, popcorn, crackers, etc. I even made ds a really cool race car themed cake with hotwheels and flags while we were staying in a villa.
Even if there is no possible way this summer, if you start saving just a little each week now, maybe you could take a more extravagant trip next year which would make skipping a year not seem so bad.
Sorry to go on and on, I just hate to see anyone skip vacations, life's too short!