Cheap giant pizza oven?

Question:Any ideas on how to make a pizza oven that can get to a decently high temperature (400?) that can fit a pizza that is 4 feet in diameter while being extremely cost effective(<$150)?

Answers:
I think you are dreaming if you want an oven that big for that little, but you can build your own for about $500.
The best wood fired pizza ovens actually cook at closer to 900deg, easily attained in a home-made brick oven.
check out
http://www.fornobravo.com
they have a great forum to ask questions, get advice, and free downloadable plans for the DIYer.