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Check out uuni pizza ovens. They use wood pellets for fuel and in 10 minutes of pre-heat mine gets to the necessary temp to cook a pizza in a minute or so. Small enough to put on table on a balcony or fire escape and you can even pack it in a carrying bag and take it on the road.
Thanks for the suggestion. How do you like the uuni pizza oven? Also, does using the wood pellets get you a smoky taste to it?
Downside is that it only does pizzas. No chance to do pizzas one night and then use residual heat for bread the next day, etc. If you have the means and space I highly recommend a real clay/brick beehive oven, but once you do pizza in a high heat oven you are never going to go back to trying to crank up the temp in a conventional kitchen oven.