its good that you are thinking about things sensibly. depending on where you live flats will vary in rent, say �400, then you've got c tax, say �80, a bond to place on your flat �400, your gas, electricity, water rates, tv licence, phone line... then there's furniture, and all the little things will really add up to a lot! (kettle, potato peeler, pots and pans, cuttlery etc). then you will have to fill up your cupboard with food, cleaning products and toiletries. it can be done, but as advised, don't do it untill you really can afford to do it. (ps, it is very scary having your own place as a young adult... if anything goes wrong... its down to you)