Definitely the loans should play a big role in your decision since they are both great schools. If you had said you're sure you wanted to do community pharmacy, then UH would be equal to Tech in the education you will receive towards that goal. Since you are interested in clinical hospital pharmacy, unless things have changed in the past few years, I would certainly say the better option in that regard is Tech. Tech will prepare you for clinical pharmacy better than any other school in Texas including UT. Hospital jobs and residencies are hard to get, as are hospital summer internships (which really help build connections and skills towards residency or hospital jobs right out of school), and Tech gives you a leg up on that.
As far as the wanting to end up in Dallas afterwards because that is where you're from, I agree that the connections from doing rotations there may not matter much when you go to apply for a job, but at least you will be there already when you do end up finding a job or residency there, and not have to travel for interviews, move after graduation, etc. And if you can save on living expenses for 2 years, do it! Also, Amarillo has a low cost of living compared to Dallas and Houston, so you will likely save money those 2 years too.
As far as Amarillo being boring and basically sucking, I thought the same thing before I moved there, especially the first day I smelled "the smell." I was like, "oh God, what is this place?" I didn't really like it at first, but by the end of 2 years being there I loved it. It had just enough amenities, eating places, a mall, etc., to feel like a city, but there is never any traffic, it never took me more than 5-10 minutes to get anywhere and it has a nice feel to the place. And "the smell" only reared its ugly head every once and a while when the winds blow just the right direction. I wish I could go back actually. About half the students there are from either Dallas or Houston anyways, and they seemed to like it just fine for 2 years, though most ended up moving to Dallas for their rotations.