OP- there are lots of professions where your employer will pay for you to take additional courses- either for an advanced degree in your field, or for certifications, or just to make you a smarter, more valuable employee. Agree with the other posters- your goal right now needs to be to get out of college with a Bachelor’s degree and a marketable profession with the least amount of time and cash expended. You’ve got the rest of your life to take additional classes in all your areas of interest. And allowing a friend to pay for your education is a really bad idea. Stuff happens in life- your friend becomes incapacitated, gets sued, is about to go bankrupt- you’re kind of on the hook as the bailout, right?
You need to refocus on getting a degree and getting a job. All these classes will still be there once you are a working, self-sufficient adult.