i don't think you are portraying the life situation of those guys very accurately. you didn't mention mises. mises only narrowly escaped from being arrested by the gestapo and his library was torched. and they certainly didn't get much support from academia or else explain why the nearest you heard of them was Rand from Reagan and Thatcher until Ron Paul started talking about them.
and you didn't mention any of the new guys, like Jeffrey Tucker who entirely lives from his publishing and speaking.