Once you add in the cost of all the added contractor taxes and loss of benefits like healthcare, this would be a bit of a paycut for me. I'd want more hours.
minus vacation, taxes, health insurance, overhead (time tracking, billing, book keeping, etc), time between gigs. 2050052 you are coming in way high. You can cut that in half and get a reasonable estimate for take home.
There are people who are perfectly happy with about $250K of take-home pay a year if that means they have plenty of freedom to do other things. In fact, I bet many people in the US will be happy with $30K a year, not $250K.
Of course, but why would someone be happy with that if it's a significant downgrade from where they are now?
at that rate they're probably the top of the field? I'm a UX engineer for ten years and the highest rates I've seen are "only" 200ish...