I would look into putting the dollars into a winch and some tackle. A good self recovery setup might be better bucks spent. But, if you go out with friends or where there is people... just stand waving a strap, someone will pull you out. Much cheaper, no maintenance, and you make new friends!
P.S. Always throw a shovel in the bed before you go out. Most used recovery items are a rope and a shovel!
j