@Steve Porcello
The licensing process is relatively simple. Deleading course + bloodwork will probably run you $500-$750 tops. However, the barrier to entry is the execution of the actual de-leading. There are strict rules on containment, proper methods, disposal, air testing etc that may make it un-economic to do it yourself. The hardest part is passing of the wipe test in the end. Most DIY run into issues with improper cleaning and end up having to do 3 re-inspections before passing, which runs about $350-$400 per test. Additionally, you'll need to buy protective poly sheeting, make a capital investment on a HEPA vacuum, get a air filtration machine etc. It can all be done, but requires the extra effort.
You can think of it the same way for a construction project. You can get a CSL to be your own "GC" and pull permits and do the carpentry work / sheetrocking, but would you be better off hiring a GC with an existing CSL.
I can shed more light on this should you have any questions. Happy to help.