If I was single and incredibly poor with no other options, and he had a condom, and he was quick about it, then yes.
No doubt $500/hour is good pay, but when it comes to sex, I would rather "give it away" than get paid for it. For me, getting paid for sex crosses a personal line. I just wouldn't do it. I'm not making any judgments about people who see it differently, however. Now to be perfectly honest, if there were a few more zeros it would be a much more difficult decision and perhaps a different story.