Doughboy is right Charles. Don't buy a fixer upper RV..you'll spend more than you think. There are plenty of really good used units in Texas..can't say that about everywhere else. When you find one, get someone in the business to do a full inspection for you. The most popular right now..Heartland and Dutchmen (and others) have built a lot of lemons the last couple of years trying to meet demand and have forgotten about quality control. Beware of buying crap!
Consider how much you are going to use it and how long. You may come out better buying a new unit since you can get better financing on a new unit...but again be careful, there's a lot "new"******being sold too since RV manufacturers are unregulated. What kind of toys will you haul, and how heavy? How many will the unit sleep, etc...ask yourself anything and everything. Read forums and the type of complaints customers are having with the brand you may be looking at. Some of the most popular toyhaulers..brand new, straight off the lot...are having many problems because customers don't do their homework.
Good luck