you could try a sigma 10-20mm. It's not as fast as the tokina but B&H is selling it for under 300 new right now. Ive had mine for a year and a half, good build quality and comparable to the 11-16, maybe a little bit less image quality but pretty close
i tried tokina 11-16, sigma 10-20 and i own a rokinon 14mm. 10-20 gives you obviously the best range which can be fun while taking pictures. 14mm is pretty cool and wideeee, not really sharp in corners tho, normal for a uwa lens but didn't have that much of a problem with the 11-16. Overall, my favorite one is the 11-16, for its sharpeness, the 2.8 aperture, reallly good uwa lens for aps-c sensor camera. Would go for it.