hah my ISP is similar to yours...
Its actually too far to simply bounce off the ladder... So I had to buy a router I could creatively re-engineer to use as a wireless network card... It also functions as a wireless router.
But it still bounces wireless internet off my house, off the trashcan lid, off my car, off the neighbors mobile, off their truck, and then up inside my other neighbors house (100 yds away).
Been getting ~1mbps download speeds though, so I can't complain too much.
My creatively re-engineered router is sitting inside half a cheerios box, lined inside and out with tin foil...
Its so fashionable, I've been considering making a hat that looks like a moruga scorpion out of the stuff...