Wooden dog crate

I know there is a way to build a wooden dog crate like the one by denhaus for less than $500, not to mention it would look alot better than the metal one I currently have in my livingroom....lol I would like some suggestions on how to get started building a wooden dog crate. It looks pretty simple though I don't know where to begin or how. Any suggestions would be greatly appreciated. Thanks guys/gals! :-)

Here is a link to the crate I'm referring to just incase.

http://www.denhaus.com/den/b/build.asp?cat=1&view=TownHaus_Wooden_Dog_C…