Have you asked the school about accommodation? They have a lot of apartments rented in the Arcadia complex for the Libyan and Kazakh students, might be able to get you something there. You could also try the likes of the CIT/UCC student accommodation places such as deans hall, parchment square etc, there's a couple of them in bishopstown and more on college road.
Maybe try Ballincollig also but rent isn't cheap there, nice location though.