I chose private accommodation as it was cheaper than halls. It is a bit more difficult to arrange than halls as you have to be in London to see the rooms but it's the way to save some money. I lived in New Malden which was cheaper than Kingston and still within reasonable distance from the campus the town centre. There is a useful shortcut between those 2 places which I found out from my colleague so it's always useful to ask local people about it. If you decide to rent privately, make sure you see the room by yourself and agree on on the details in advance. Insist on signing contract too. That's you proof where you live and it might be useful on many occasions. Also, ask as many questions as you can think of. I had some unpleasant situations with the landlord as I found out later that some areas were restricted and I couldn't use all the kitchen utensils. It is always better to know everything in advance so don't be afraid to ask.