I find this concept fascinating. The implications of super powered bodyguards/mercenaries, doing specific jobs for the right amount of money. Can you imagine how powerful billionaires would be by putting these heroes on a permanent retainer/salary? Didn't Justin Hammer do this with super villains at one point?
While Luke Cage and Danny Rand did this in the past, I don't think this is something either of them would revisit. I also can remember a time when Peter Parker was so strapped for cash, that he may have considered it.
For the sake of argument, are there 4 heroes in the current MCU that would use their abilities for financial gain?