Dentists do, so do dental lab owners, the technicians working in them seem to be on crap money though.

I don't like the idea of being self employed in a trade, (not straight away anyway).

Also thinking of maybe getting a HGV license, seem to be jobs knocking about for driving them. My old man does it and he wants me to do it also, he'd stump up the cash for me to take the test. Not sure if I fancy it though...