How much would it cost to build a minipipe?

Factual Questions
1

How much do you think it would cost to build a skateboard mini-pipe that is 4ft height 8ft wide and 32 ft long?

2

I built an 8’ long, 4’ wide, 4’ high launch ramp. Took $200 in material (and 3 weekends). And you’re talking about a considerably larger project.

3

This thread was accidentally started twice, so I’ll close this copy. See the other thread for more responses: http://boards.straightdope.com/sdmb/showthread.php?s=&threadid=208283

bibliophage
moderator GQ