My trike is like a MAC truck. It's designed to handle a 400 pound person easily. So the frame is built extra heavy duty... It is also very long unlike a typical trike. Mine has to be broken down in order to fit in a car. All three wheels are 406 or 20" in diameter. If I want to go anywhere, I have to use my partner's pkup to haul my trike around. And its so heavy that I can't just lift it into the truck.

Terratrike, Catrike, ICE and Greenspeed will be much easier to fit in a car such as my Prius. Fold down the back seat in your car and you may have to take off the back wheel and fold down the back rest of the trike... really not much more than a regular bike. Check out their web site and watch some youtube videos. And don't be shocked by the price tag. You can find a lightly used trike for much cheaper price.

I think someone has a rack to transport a trike as well. here it is http://www.hitchrider.com/trikes.htm as an example. This is if you don't want to put your trike inside your car.

There may be a recumbent shop near you so search for it and go take a look.