I just bought a small portable pizza oven, that operates off of propane. It supposedly heats to 700 degrees, though I have only gotten a bit above 600. Bought it at Sur La Table. Called "Pizza Pronto." It heats up in 10 minutes, plus the 10-15 additional for the stone. My pizzas have gotten better because of it. I am not yet in the league for a grown up outdoor pizza oven, so this is cool. Doesn't take 40 minutes to get to 500, like my kitchen oven and saves on energy. Plus the higher temp makes a difference on the outcome. Cost was $300. Passing it along, in case it helps.