Theres a recent generation of backyard pizza ovens that use live fire instead of thermal mass to hit and hold the high temps required for good Neapolitan pies. Because they're less massive, they're also less expensive. One such company is Ooni:
https://ooni.com. I had the Ooni two and upgraded to the Ooni pro, and I can't recommend it highly enough. I use it with wood or charcoal, though there are also propane options. Worth looking into and a lot cheaper than a full stone oven. Also heats up a lot faster.