I have one and have used it twice in 3 years
You need to feed the fire constantly and stoke it for each pizza
I almost passed out from the carbon monoxide too, started getting really dizzy and sick and had to step away

Basically you won't actually be eating pizzas if you're making pizzas
Best case is someone else assembles and you just man the oven, if you're doing both you'll lose like 200+ degrees between each pizza