The blades are certainly cheap enough. I think I could probably put something together for sure. One of the draw backs to living in isolation is that the simplest of supplies are tough to find. I did give this a we bit of contemplation already. The part that leaves me wondering is the effectiveness of the blades on hard slate. In most of the city centers there are stores that cater to backyard inventors, in Canada the leader on that is called Princess Auto. I think that at this point I am going to buy, but the build is certainly a more romantic thought. The power hacksaw is a very good idea though.