squeeky, its only £20, go for it. If anything comes from it then great, if not, boo hoo.
what I will say though is get your arse out the door and canvass - you've been wc'ing for years and you haven't got a big enough round - thats just not acceptable, you seem a really nice bloke, but also lazy and you seem to hate the thought of canvassing.
just get out there and canvass, don't wait on them calling you - trust me, after a while you will start to enjoy canvassing.