Word to DH being expensive! when i was real into it, i was droppin MINIMUM of 500 bucks a season just on parts. blowing shocks, tires, derailleurs, chains, etc etc. thats not including stuff like protective gear, shorts/jerseys, goggles, gloves, lubricants/tools, car racks, gas to the trails/shuttles, etc. its a wicked expensive sport.
as for skiing, it can be done for next to nothing. skis, you can either go used, for literally next to nothing, or buy a ski like an 06 silencer for 100-150, z12 for like 100, decent last years boot like a dalbello Aero or Salomon preforma boot. that right there is around 350-400 bucks, FOR ALL YOUR gear, brand new. outerwear can be had for 200.
you can easily get a quality, new setup for way under a grand. if you buy slightly used stuff, you can get gear for under 500. season passes are anywhere from 200-600 bucks. 1000 bucks for all your cost is pretty damn cheap compared to many sports.