We offer touch up, PDR, hail repair (!), interior repairs, windshield repair, tint, alloy wheel repair, and more.
With the exception of paint touch up, all of such work (to my standards) is done by sub contractors, in my Shop. Delegating skilled work is smart - focus on what you do best, and also reap the rewards of the work of others.
As a rule, I am able to pass along twice what the sub charges me. We've recently had hail storms... to date we've done just four claims, averaging ~$3000 each. Results are amazing, and I get $3000! with more to come.
Regarding PDR training, please do your due dilligence in research. It will take months of constant practice to really have any skill at all, and years to become truly competent at the trade. Oh sure, it looks simple...
Good Luck.
Jim