longboard

So i just joined here and have been lurking for a while. im planning on building an electric longboard, i have access to a machine shop so i can make the gear housing and truck mount myself. here's some parts ive spec d out, what do you guys think? motor esc batteries (might buy 2 of these)...

YO, I've been browsing ebay in the hopes of locating parts to construct an electric longboard to cruise around campus with. I need some help as far as finding the correct parts for the application. I'm looking for speed up to 20 miles an hour, at least 10 miles range, and a total build cost...