You could do what I did and look on craigslist for an older chest freezer for cheap. Four of us went on an August cow elk hunt in Oregon a few years ago, and that's when I bought one. Found it on craiglist for $50. It's probably 40 years old and doesn't look the greatest, but it works well. We were able to fit all four elk (quartered) in the freezer, with room to spare, and kept the meat cold on the drive home and then for a few days until we had time to get it all cut and wrapped.
Matter of fact I just plugged it in tonight, to get it cold for my dad's elk hunt which starts Monday. When we get his elk back here we'll throw it in the chest freezer, and I'll be able to cut and wrap it whenever I have time.