150m isn't very much for such a project. This amount will have been mainly used to get the provoders (EE, Vodaphone etc) to erect their masts in places which are not profitable for them. Also bear in mind that the providers often have to pay rent on the land on which the mast is erected. A farmer up the hill from me has a phone mast and 3 wind turbines on his land and is very happy with the extra income for doing nothing. But I don't thnk the providers are all that happy for much expenditure with little return.