Alot of architects end up teaching as a way to make better money, and stay fresh.
It's a very LONG haul, indeed. I decided to be one in 1980. By 2000 I had my practice, such as it is. I've also come to the conclusion that you haven't done it all until you've done it for yourself, that is, run a practice.
So we're "cool"? Good.
I repeat my advice to go to the SPOT meeting and I'd add that I would attend some "crits" at the UofT before you apply. It'll give you a sense of what it will be like in school. It's not nearly the gauntlet it used to be when it was a 5 year program, but the ferocity of the criticism may surprise you. I'd spend a day or two just attending crits- not just the year-end ones either. Hang out at the faculty and get to know the schedule.