Has anyone done this?
Ds currently lives right by the train station in Oxford, and has a really cheap rent of about £400 a month plus bills in a very nice house (a friend owns it) . He needs to be in London four days a week for work for the next 6 months as part of his training. The train is expensive if booked on the day, but if booked in advance can be very cheap. There is a bus too, but is much slower, but cheaper.
He is thinking of staying in his current house as would be close to friends/girlfriend. He wants to save any additional money to be used for travel around South America for a few months.