Have you considered freelancing or running a small consulting business?

I admit that if I was faced with the opportunity of hiring someone a lot older and experienced than me I'd have two immediate thoughts: "This guy would be a great asset, we need him" and "I think I'd be way too intimidated and nervous being his boss, can't do it".

Doing consulting work solves the second question since it changes the boss-employee dynamic to a more business-to-business like one.

Now, I am not in a position to hire anyone so take my introspection with a grain of salt.