You'll fry like an egg hanging out/boondocking in the desert southwest in the summer :)...unless you go to high elevation places like Flagstaff, Grand Canyon NP, Bryce NP, etc. We go to the coast in the summer. Just be careful not to dehydrate yourselves. Very easily happens when you don't drink enough water.
During your travels, you may find a car for sale already set up to tow (used as a toad) from another RVer. Then you may just have to buy a tow bar (can also find used ones). This is how we bought and sold our previous toad via craigslist.
FYI, you can get adapter endpieces on tow bars to match a different brand car base plate. For example, We have a Roadmaster Falcon All Terrain tow bar that I hook onto a Blue Ox baseplate on our car.
By the way, we also bought our current toad (barely used) from a dealer here in AZ. It already had the base plate on it! The story the salesman told us was that a Canadian RVer bought the car new from them. But when they drove it back to Canada, found out they had to pay big bucks at the border. The RVer drove the car all the way back to AZ to return it and get a used car instead (less value). Meanwhile, the RVer had already installed a base plate onto the car. Lucky for us! Not sure we believe that story though.