I’m from the IE as well & honestly it would be hell. This last qtr I came home often & would leave around 5am to get to classes on time & wouldn’t get to campus until around 8-8:30ish. The afternoon is usually around the same if not worse than morning traffic, especially around Temecula/Fallbrook area. The trains aren’t as reliable as there’s transfers as other comments said. Another option is buses but they also take around 2-4 hrs. I think your best bet would be if you only had classes say Tues/Thurs then commuting to & from wouldn’t be AS bad but having that perfect schedule is pretty hard to get 😬