Sorry for posting so much lately... but any advice would be appreciated

Like I said,.. sorry for posting a lot... this site is amazing and has helped me a lot... also, asking my family anything is like trying to draw water from a stone.

If your spouse said to you, hey I want to go back to school to become a doctor (clinical psychologist)... what would you say? Keep in mind its thousands of dollars (there are grants, scholarships, student loans, co-ops that pay and once you find a job, good pay), time (8 - 10 years... but where I'm at, 8) and less free time to spend with the spouse (between working and school)

OR,

If your spouse said, hey I want to go back to school for four years (a different career choice) ... again keeping in mind the money, time and whatnot, what would you say to him/her?

Please give me your honest opinions, because I want to know if I'm being selfish or not. I'm trying to look at things from his point of view. If it helps, I'm also (almost) 25 so there's the age thing too... biological clock ticking and all...