How about both.
The risky side in me says take $20k of it now and buy 20 acres of land in Joshua Tree and hold it (if you've never heard of Joshua Tree google it, it's a beautiful national park in CA). Doesn't have to be Joshua Tree, can be anywhere that will be worth more in the future. Land is a long term investment but you can buy a lot of land with the money you have. It's true that $75k won't take you all that far but you have it now, you may not have it later so better to spend it wisely than not spend it at all, especially if you're making enough money through your internship to cover most if not all of your tuition.
The even riskier side of me (think about that) says a a good career can give you the power to borrow a lot of money from banks which can take you a lot farther in real estate. Start to learn about what it takes to borrow money to purchase real estate (mortgages). Unless you have enough cash to buy a property you will need to borrow money from a bank and to get approved for a loan from a bank you need to have consistent, stable employment. Is your internship in Information Systems? I'd keep growing in that field, sounds like you're good at it, try to get better and higher paying internships every semester in Information Systems and make sure that by junior year, because of all the work experience you have in Information Systems and your grades, you have a solid job lined up for once you graduate. With that approach you'll be in position to purchase a property within the first year or two after graduating. Which means you'll have 20 acres of land AND a rental property ;) good luck!