If you chosse to stay at expensive place - Your salary can increase with cost of living so you still make good money in 30 years or however long. Also, you would have to work full time for it to be considered a career so you can't say nothing.
Common replies are:
- Artist
- Musician
- Mechanic
- Porn Star
- Librarian
- Photographer
- Journalist
- Critic of movies/books/food/blowjobs
- Brewing/Bartending/Beach Bartending
- Acting
- Pro Athlete
- Various types of Teaching
- Video Game dev/tester/player
- Blacksmith
- Hobby Store
- Mattress Testing
- Zamboni Driver
- Oxygen Breather