Hi, Josh. People don't realize, when in school, that they can major in two or three things at once and continue to do them outside school. This puts you in good stead if one or two of those things folds up for a while - or if you become injured (unless you only major in piano and plan to never be injured - or take out insurance policies on your hands).
I like your idea of continuing with web development, teaching english, and practicing on the weekends and in the evening during the week. Then, you can literally do all three. Start out by taking from a teacher at your local uni - and find out about master classes. There, you can start performing and feeling what it is like to perform weekly. Also, it gives you motivation to really practice that week. Most students don't like to embarrass themselves on purpose. By the end of the year, your brain will have improved memory for other things besides music - and it serves a cross purpose in that all these things can work together.
Seems this is the way it is for vocalists, too. Not everyone is going to be a superstar. There are a lot of 'casual' singers in a Master Chorale, that practice very very hard but perform for fun and for free most of the time. Piano has been this way for me - a way to share. You can perform for friends, gigs, fund raisers, retirement homes, and things like that - and be almost as fully satisfied as a concert artist doing tours and practicing 9 (or less, i guess) - hours a day. And, you're less likely to get the typical hand/arm injuries from overpractice. That's another good thing.
For me, three hours at a time - take a break - return and just play fun stuff. See what you have in memory. Don't try to play nine hours a day. It's just going to make you start breaking down. Go read a book. Exercise. Don't forget to drink water. Do your studies. Life can be fun in balance. Who wants to be practicing around the clock (practically everyone on the forum, ok) - we all love piano - but it's just not really good for you. 'If God had wanted you to play piano all the time, he would have attached keys to the end of your fingers.' (hey, i just came up with a new signature).