Two inexpensive places are Firefly on the beach

http://www.jamaicalink.com/


And Jah B's across the street from the beach
http://www.negril.com/jahbs/

Both have room's with private bathrooms and ones with shared outside facilities so if you want to pay a bit more to get private. Firefly is really nice and Jah "Bs is more of a locals yard type but clean,

Whichever you stay at you can rent cycles in front of Jah'B's