if you're having doubts now, in 2nd year of university, then your best move it to just get out of architecture now. seriously!
there are ways to become filthy rich in architecture such as getting together with some other people like builders, solicitors, accountants, etc and starting a property development group. or even just becoming a building contractor. the ones with a good business mind make a lot of money.
but these routes can take some time to establish and i don't think you'll be able to stick it out that long. not if you're having doubts in 2nd year.
only if you're totally, unhealthily, all consumingly obsessed with architecture should you spend 5 years studying it.
good luck.