I have not been at T-Line since I think around March 8th. Was going to head-up last weekend, but the weather wasn't the best and the snow not so hot either (according to WhiteGrass and trail report).
On the subject of building a small terrain park, its a pretty good idea. I've actually been thinking about how cool it would be if something like that were built. Just to throw out some suggestions:
Build your features out of dirt. This will make snow management that much easier. Not completely built, but get the overall layout for your step-downs, step-ups, rails, etc. built out of dirt (as well as the walls of the pipe). Then all you have to do are shape some nice take-offs and walls and you're good to go (and coat the park with some snow, esp. the landings).
There are quite a few tools out there, moderately pricey, but GREAT tools for managing any park. The Heine Grooming Rake is useful for smoothing run-ins, take-offs, and kickers that gap to rails. http://www.heinetools.com/groomingrake.htm
Unless you've been in the jump-building business for some time, you'll need help getting the transitions right (still troubles me some). Heine also makes a wonderful tool for this: http://www.heinetools.com/tranishovel.htm
In terms of rails, I don't know what you'd be looking for. But there's a pretty sweet setup running through my mind inspired by a lot of the ones I've hit at Snowshoe and such. You definately need a 20' flatbar up on a small table that has a foot-1.5 foot gap into it. Rainbows are nice, but you need a LOT of speed for them. Another good option is a flat-down rail. These are great for gapping onto as well as just sliding, as they are easy enough to throw down a lot of various tricks on them and hard enough to keep you on your toes. Funboxes are great, but save the money and build one yourself. You definatly want a pretty tall flat rail that is gapped into (big gap in) and big gapped out. If you really want to get creative, buy a down-flat-down rail, its on my list of things to accomplish because you can gap the down-flat and land on the last down section (and then 270 on, then 450), or try to boardslide the whole thing. If this is more of a locals park, you won't need a ride-on (like Timberline's 15 footer). Finally, I'd build a nice wall out of skate halfpipe materials to slide up. And it would be sweet to haul off an old, discarded semi as a box (but that would be hard to come by).
Anyways, look at the rails at http://www.fallline.com/ski/terrainpark.html.
Of course you need some people to help build all of this. Perhaps offer the lending hands free passes for the season? You could even offer volunteer places of employment. You will have to charge when you get it up and running. Probably atleast $10 for an allday ticket, which means its gonna have to be a business... which is a challenge.
Oh, and if you're looking for info on snowmaking and rope tows:http://www.snowathome.com/
Interesting rumors flying around about me... I'll have to find out where those originated. But until then, I'm off to Utah. Think snow!