I agree, it's a lot of fun, but I don't know about cheap.
Once I was able to make a decent dough, I began to obsess over it just like beer. I started trying different styles, pans, $400 mixer, $2000 brick oven, several different flours in bulk, different kinds of tomatoes by the case, a multitude of cheeses and toppings to try. I could go on and on. Now I'm working on a mobile pizza project with a friend. We turning a vintage '67 Airstream camper into a pizza kitchen, including a wood-fired oven.
We took the body off to beef up the frame and install a new axle and floor. We built our own service window and are about ready to fit out the interior.
I hope I don't get sick of pizza anytime soon.