If you want the closest place to stay for CTC bournemouth, Avon Causeway is just 4-5mins away and when my gran stayed there last august it was only £14 b&b for a small single room.
Handy for anyone to know if your on a tight budget, or just wanna spend the savings on beer (beer there is fab!)
http://www.avoncauseway.co.uk/index.html