Nah quite a few are 19, as I said, about half of incoming students have done TY so will be either 18 or going on 19. Students being 16 is a thing of the past, there are still a good few who have just turned 17 though. Yeah Trinity doesn't really do a commerce course..the main business course is BESS, 460, which is populated by orange, abercrombie d4 heads, the eh sloane equivalent here. UCD has a really well established course, but yeah, Dublin is expensive. Although, minimum wage is really high, so you wouldn't have much of a struggle if you got a job. UCD is a bit out of Dublin though, but located smack bang in the most expensive part of it. Yeah Maynooth is very near me, lovely cosy campus but not a whole lot of business/commerce courses.
I love it! I commute from home, takes about 35 minutes, so yeah, accom. isn't a problem. It costs €6k a year to live in Trinity Halls though, rip-off, much. I spend all my time in the beautiful front end of campus, the back end is the science/medicine end. The SU is very very active and it gives a great atmosphere to college, brilliant student newspapers and societies too...there's 2 debating societies that bring in big names and great debates. No SU bar, but the city centre location makes up for that.
You might be better off ringing them, the main line has to answer..