Invest in a personal account with the local plumber?
Re neighbours - Well as an engineer I would say make a sound-proof box just big enough for the pipes and put windows in it to see the chanter fingers. make it knee-shaped at the bottom and - oh you get the idea. It would be easier than constructing a full size anechoic chamber and have to endure the ear clammyness it produces.
Tell me what sessions you are playing at and I will pop down to Bristol with my bodhran and act as decoy. **BG**