These are excellent SAT scores. 760 in math is however low for MIT. 760 in math is only very slightly below the 25th percentile for Stanford, and is good coming from a low performing inner-city high school.
UT Austin is a very, very good university, both overall and for your intended major. When I was a graduate student at Stanford (master’s degree) the other students in the same program had come from a very, very wide range of universities, and I am pretty sure that the average ranking of the various universities that students had come from is lower than the ranking for UT Austin. A bachelor’s degree from UT Austin, if you do well and get some internship experience, would make you competitive for top masters programs, and this plus a masters from Stanford or some other highly ranked university is likely to cost you less compared to just a bachelor’s degree from many of the schools on your list (including MIT and Stanford).
Also, MIT graduates and Stanford graduates routinely work alongside graduates from a very wide range of other universities. In engineering and computer science once you have your first job no one will care where you got your degree, and the high tech industry is on the upswing in Texas.
I do not understand why you would prefer UC Santa Cruz over UT Austin (the banana slugs at UC Santa Cruz are way cool, but once you’ve seen one…). This however assumes that you get your desired major at UT Austin, and my understanding is that this is not guaranteed.
I would avoid debt unless there is a compelling reason to take in on. I suppose that the difference between UT Austin with no debt or Stanford with debt might come down to how much debt is involved, but again a bachelor’s at UT Austin plus a master’s at Stanford might cost less and could be a very good combination.
But the competition for internship and research opportunities is also intense at the highly ranked universities. I did find good opportunities as an undergraduate at MIT, but my family members found equally good opportunities at universities that were ranked lower than UT Austin. Perhaps one issue was that they were able to stand out as strong students in their classes (which is tough to do at MIT). It is not obvious to me which way the opportunities are easier to find, but I think that there are lots of opportunities at lots of universities.
One issue is that when employers are looking for interns, they will often recruit at the very good local university, whatever that is. Internships are definitely valuable.
I do know someone who got into CU Boulder out of state with some merit aid, with a GPA very close to yours but a significantly lower SAT score and a lower class rank (coming from a competitive suburban high school). They however had a different major and you are applying for majors that tend to be competitive (for those schools that consider major for admissions).
Best wishes. It looks to me like you are likely to do very well wherever you end up.