lucky my local school does it 30"x whatever... I think the largest I've done is a 30"x56" (since the widge is max 30", the length can be as long as you want it to be)
And they use a chromira machine to print these, so it's not costco's ink jet. It's actual chemicals to yield the best results! (Yes, this means you can wash the prints). They use Fuji Archival Lustre paper all the time though.... Free prints is included in the tution 🙂
When I went, it was 160 a session (each session consists of roughly 12 weeks? ~ a semester) and you can take all the classes you can handle there... they have classes everyday except friday, which friday is just lab day and studio day.
I think now the price is up to 180 bucks/ session...