We had enjoyed driving (and towing) our Chevy HHR for the past two years, but decided we really wanted a larger, more comfortable ride. After reviewing the various vehicles that can be towed with four wheels down, we bought a 2010 (used) Buick Lacrosse, which was loaded with all kinds of great options. This car drives great and seats four comfortably. Of course, we had to set it up for towing and the first step is to install a towing baseplate on the car. I used a Roadmaster baseplate and was very pleased with the fit and installation instructions provided.
While this sort of installation is never easy (I have installed several over the years), it is not a bad job if you take your time and carefully follow directions. Some pictures of the install are posted at Buick Baseplate