That sounds reasonable for 1 person. If you want to include the GF you should double the amount. Shit will happen trust me. I would say if you want to do it with only 2K a month then you better have at least $6000 in the savings account before you move out. Yes that sounds very difficult but look at it this way, it gets much harder to save money when you live on your own, and if you get laid off you will be able to pay bills for 3 months.