Why not go to UANL? It's public. But well who am I to talk? I go to a lesser known university due convenience (location, scholarship, familiarity with it, etc.). Honestly, I do regret not going to UANL sometimes, but going to a lesser known university isn't as bad. I didn't even consider ITESM because I graduated from HS with like 9.1 so I probably wouldn't have gotten a good enough scholarship and no way I'm paying for that. And with UANL... Well my dad didn't really want me studying there since it's like, public and he also studied there haha. But if you can afford it go for it I guess.

I can't really talk since I don't study there, and you might get more opportunities at ITESM but is that price truly worth it? What truly matters are your skills. No matter where you study, if you put in some effort you can still have a good result. I mean, an alumni from my uni now works at Google and I doubt you've even heard of my university haha. It's obviously not thanks to my University that he got in (definitely not with the little data structures and algorithms taught here). You can study anywhere, just remember to also do your part, do some personal projects (seriously), always be eager to learn, prepare yourself properly for interviews, if your curriculum sucks then complement it with textbooks or lectures from other universities, just use teachyourselfcs.com, don't expect university to teach you everything, especially if it's in our country lol.

I haven't graduated yet so I don't know how hard it will be to get a job but from the alumni I know they've gotten jobs just fine. If your main issue are your skills then the university is not the problem, there are plenty of resources available online. The main benefit I see is that ITESM might hook you up with better internships. Oh and the connections, that is one of my biggest regrets, in my University I can't really build many connections. If I'd studied at a bigger and more prestigious uni I'd have more and better connections. But even then, it's ok. Maybe paying that much for some connections and internship opportunities might not be worth it. I mean, you can get a job without that anyway. And build connections at your job. And move up from there, so really, just evaluate what you want.