I'm in almost the same situation as you, Leemew. I live in Texas and want to be a large animal veterinarian, but have very little financial help as well. I aim to attempt TAMU as well but am unsure about exact logistics. I might move cross-state. Not sure yet. My family is lower middle class. The only difference is that I'm a junior, so I won't be going to college for two years.
Have you applied for financial aid? I just applied for it, to see what I can get. Its worth a try.
I've been lucky enough to shadow a local small animal veterinarian for the past two years (three times a year) because we built a relationship with her through my wobblers/luxating patella recoveree puppy- strangely enough. One thing that both she and my BO have suggested to me is to go to a community college that offers a tech program and go there. Get the classes that I need for my associates, but also work towards becoming certified as a veterinary tech at the same tim (a lot of work, but possibly worth it) so that I can work at a clinic as a Vet Tech through my actual veterinary college, or even before that if I have to- to save up money in order to pay off tuition/housing/car. I've also been told that Blinn community college is a great one to attend if you're aiming for TAMU, because they are a sister college to the university. They actually even have some of the same professors and some great A&M prep classes/family groups that you can become a part of to make transitioning to TAMU smoother.
My personal plan is to work my senior year as much as I can, and either attend a community college here in town but also take online courses from Texas Tech (they'll certify you as a vet tech) or blinn to get my vet tech degree before I graduate junior college, then transfer to TAMU and hopefully get a part time job as a vet tech or assistant. That way I can at least pay for my housing, if not part of my tuition. I'll pinch pennies all of the way through college and after while I'm finding a job, until I've paid off my students loans and can buy a house (at 60 years old maybe? LOL) its not a perfect plan but it seems like the closest that someone in my (or your) situation can get to.
I wish I could be more helpful. Good luck and know that I'm cheering for you! I know just how frustrating it can be.