The only guys making anywhere near those figures have their own rigs. If you think learning to fly was expensive look at the cost to outfit and maintain a welding rig. It's akin to running your own business, working contract work.

No cheap Chinese crap on those things, just Blue and Red.

It would be akin to being a contract pilot, supplying all equipment and ratings needed (SimCom or FSI current, all charts, etc.) and pay for your own transportation to/from, hotels, etc. A buddy of mine was typed in Falcons (had numerous types) and would do side trips making $1,500 a day + expenses.