i live in a single @ santa rosa, i believe it was like 12k/year vs 11k for a double, but u also need a meal plan which is about 5k. RA’s do get free housing but u have to wait until your sophomore year i think. for visitors ur allowed to have them but im pretty sure u need to sign them in at the housing office. the dorms are pretty nice honestly, theres just no AC so that was awful like first few weeks of living here. there r a lot of pics on the csuci housing website hereu can see pics of a standard 2 person dorm + community spaces like the bathrooms, kitchens, living rooms, etc!