OK, assuming the parents are paying for college, let's talk lemonade. If your school is like so many, there will be many extracurricular opportunities - the theater dept is always crawling with actor-types, but fewer willing to crew/ do the heavy lifting that goes along with tech theater as well as the actual run of a show. You can stay involved by participating. And computer skills tie perfectly to lighting and set design so in fact would enhance your skills in that arena shd you decide to go in that direction. All the latest diagrams, blueprints and hanging plots are done with computer programs that allow all kinds of quick and fascinating options.
You can certainly double major if you have the time and inclination, but in fact, several large theater depts (or those w on-campus theaters used by outside companies) have paid positions for their FOH staff and backstage crew - you can run spot or the rail, help hanging/focusing lights, loading in or out sets etc. In addition to adding a valuable skill set and staying connected to theater, you also demonstrate to your parents that one CAN make money working behind the scenes. In fact, three shows I have recently done on campus-shared houses had crew that made their livings (or a decent percentage) by working the touring shows (and, in once case, the campus shows as well). And, FWIW, as an undergrad, I earned a good chunk of my expenses working in the box office and house managing/ushering etc for touring companies and campus shows running through our 4 theaters - mind you, this in a university with no theater dept, let alone major, just campus performing groups.
Pick the place you want to be, a campus that offers a lot of variety, and go for it!