A starter box off Ebay, 3 pounds of sculpey, 3000 popsicle sticks, and a tube of epoxy putty.
I scratch built my stegadon and scratch built my slann, according to GW tournament rules, scratch builds are legal as long as the proctor believes that legitimate effort was put into making the model up to tournament standards. Buying Saurus heroes is kinda tard, since the starter box has enough DOO DAADS to pimp out whatever you want, you could even use a spare cold one head to model a guy with the armor of cold ones. The popsicle sticks are for making the howda, cut em up with a blunt knife and it'll look like a tiki hut. You can use the extra money to get some flocking, sheet metal, and magnets to make your bases look good.