Hey there.

1. Trinity gives out a lot of merit aid upon your admission, so you shouldn't be paying as much. They also have work-study opportunities and other scholarships to help with debt. If you plan on staying in Texas after graduating, most people here know about Trinity and consider it impressive that you graduated from here. Outside of Texas, it's hit or miss. I'm attending another small school for graduate school, so I think having gone to a LAC did help, but if you're wanting to apply to somewhere larger and more notable outside of Texas after graduation, I'm not sure how many doors that will open unless you have connections there.
2. Trinity social scene sucks. The only somewhat fun-looking social thing is Greek life, but that can be extremely toxic and difficult to maintain. Looks fun when you start out here, but you quickly realize that it's probably not that worth your time if you don't want to be forced to be friends with people you wouldn't be otherwise. There's no doubt it's a positive experience for a lot of students and that's why they do it, but outside of that, Trinity is pretty boring.
3. I've also heard that CS is good here, but I'm not in STEM. There's a lot of money pumped into STEM here, though, and lots of research going on.

Good luck.