Here's the one I built. Had the old window unit, cooler from Home Depot, moving cart from Harbor Freight, 1 can spray paint. Altogether it cost around $60.
Started two years ago with a 7 gallon Anvil kettle, and a 5 gallon cooler mash tun. Eventually realized the equipment was too small for my needs. Purchased a King Kooker stand on Amazon. The JET burner drained my propane tank very quickly, so i stuck my anvil burner on top, it fit. Here's a pic...