I'm a non-trad student, and as I'm looking carefully at this crazy thing I'm about to leap into, here's how I think of the money...
I was overpaid and happily contributing to a 401(k) account, at age 23. Had I done NOTHING, and stopped contributing at age 28, it might have merrily earned interest such that I'd have (theoretically) half a million at age 55.
Then, life happened. I was divorced and penniless at age 29. I am presently in debt with undergrad loans, just about the same amount that it takes me a year to earn. As I think about what to do with the second 2/3 of my life, sure; it would be nice to be able to make up some of what got burned away. But I don't regret any of the above.
I was definitely not happier during that time when I was a little Yuppie. My observation between cash and happiness is that there's been not much correlation, and certainly no evidence of a causal relationship.
So my advice is, do what you need to do, do what keeps you interested day after day. If it costs a boatload to get there, fine. If it earns you a boatload someday, fine. Neither consideration should carry enough weight to change your decision much.