Sure it is a thriving business but IMO it will take a lot of work, experience and knowledge to do this right. Righlook.com offers PDR stuff along with TOL and just the tools alone it looks like it'll cost $3,000. That's even before the training which I'm sure will cost just as much. I thought about it, but after looking at the tools and reading up on it, it wasn't right for me. If you're planning on this full time that may work, since you'll be dedicated to PDR on a daily basis. Maybe you could find a way to hook up with a PDR guy for a day to see what he does and go from there? That might not work because of future competition but just a thought. I think I got intimidated by all of the tools that are needed which made me focus primarily on detailing. I think if you are willing to shell out the money for the initial start up costs and education and willing to commit yourself to PDR, that you have a great chance of producing a popular and profitable business.
One more thing- I thought that PDR was generally cheap? Like 60-75 dollars to fix a dent? I guess as a customer we see the cheap cost but as a business owner we see the big money?