the tires, got them from harbor freight for $6 a tire!
The charcoal one as pictured with stainless grates, stainless firebox and all other options $1200
Less for standard expanded steel grating. I've really thought about building one and bricking it in permanently in the backyard. It weighs about 300# and would be easily shipable on skids.
Still playing with the propane option it just cooks so well with charcoal but if you're really interested i'll scope it out.
We call it a "pit for a lifetime"