I've been considering either purchasing a set of rollers, or making them. Both my housemate and I cycle, and because of that rollers seem optimal for training (numerous bikes for each of us, so anything that'd be attached just doesn't work).
First, were I to build them, does anyone have any plans available?
Second, if I purchase them, can someone point me to somewhere that has them for below 300$?
Finally, are they worth it? I don't mind riding outside in inclimate weather, but sometimes if its really bad (snow, etc) I'd much rather just be inside.