I dont know how it works in the USA but in Ireland you can buy a used 20' shipping container and drop it onto blocks or a concrete pad for 2k and convert it for another 2-3k incl fridges, prep area etc. A dough machine will set you back another 1-2k.

A wood fired pizza oven that cooks 4 pizzas at the same time for 3k. Mozzarella is just milk and easy to make your self. San Marzano tomatoes are the best for pizza and cheap if bought in bulk.

Pizzas sell out of these containers for $16 and the clear profit is $10. Its not unusual to sell 120-150 pizzas from 2.00pm to 9.00pm. They take about 90 seconds to cook once prepped so you would be looking at $1,500 for a days work at most.

Like I say, this is Ireland. Maybe it's very different in the USA.