if you want a fish tank, it would be cool to move it to college, im thinkin about the same thing, but more and more a tropical terrarium with frogs seems better and better, i set up my terrarium, and its a TON easier to keep up with than the aquarium, of course ive got no problem with catching insects for the frog once a week with my bug net outside...
if you like to keep your freshwater setup, go for it, and have fun! something like that would be a great de-stresser in college and a nice addition to a (hopefully large) dorm
and if you properly prepare, moving isnt such a big deal, if its a long move you can even get sedative stuff for the fish..