I was in at the tail end of a 77 mile road ride up a six mile hill at Snoeshoe, WV the other day. There I am climbing and climbing, and here comes a buss full of downhillers with their bikes on a trailer. Now I ride XC, but I just couldn't believe downhillers existed it till I actually saw it. People ride bikes down hill and take a bus or a ski lift back up. It's just crazy. The whole point of biking (to me) is to travel under your own power.
If you're a down hiller, you ought to consider just buying a dirtbike. You already have the helmet and chest protector. A decencent used dirtbike only costs as much as downhill bike. The money you save on lift tickets can be put towards gas. You don't have to ride at only at ski resorts. Plus dirtbikes are way faster, and can jump further. If your going to use mechcanical power do it right.