The mass and the insulation of the big ovens are necessary to bake multiple pies at once with very little recharge time and can bake hundreds of pies back to back all night. This oven can't do that and isn't built for that either. It looks like there is just enough mass and radiative heat to bake a few pies for a small party. You may have to wait a few minutes with a live fire for it to recharge to bake subsequent pies. A continuous live fire would be a must in this oven. And it would eat up wood at a proportionately quicker rate but with the faster heat up times, and baking 10 pies or so, overall it would be a time and money saver.
You may consider doing a bake with and without the chimney. With this size, it may be more beneficial to lose the chimney and let the smoke exit the front.
Larry, it's a perfect little wfo for the home pizza maker. Put me at the top of the list for one of the first ones when you're done working out the kinks. If you need someone else to "test" an oven for you, I'll be happy to volunteer.