yes many people line up for NASA, but in the future the majority will most likely head for Corporations like SpaceX, who have a better track record with getting shit done.
So how many astronauts has SpaceX sent to the moon and returned safely to Earth?
And, since they're not playing with house money, I'd expect private corporations to be even more selective in who they employ, if that's possible (3,500 to 14 probably means no).
And I've got to say I'm a little confused by your sig. Why don't you just buy a house with a basement if you want a basement? I'm not a structural engineer but I've got to think a basement's a pretty difficult thing to retrofit. You'd be better off adding a second floor.