If you still want an oven (of course you do) and you don't want to construct it yourself nor do you want to be purchase a prefab oven, well, there's still hope. Lots of it.
You can hire a mason to build one for you. Yes, your labor cost will be high, but the cost of materials will be less than what you would pay for a prefab oven, so everything sort of evens out.
If you decide to hire a mason, find one who has lots of experience building ovens. You're not looking for a mason who specializes in retaining walls.
I'm going to recommend three masons, two in Maine and one in Massachusetts. Sure there are lots more, but I happen to know the work of these three, and if you hire one of them, I know you'll be pleased.
You can hire a mason to build one for you. Yes, your labor cost will be high, but the cost of materials will be less than what you would pay for a prefab oven, so everything sort of evens out.
If you decide to hire a mason, find one who has lots of experience building ovens. You're not looking for a mason who specializes in retaining walls.
I'm going to recommend three masons, two in Maine and one in Massachusetts. Sure there are lots more, but I happen to know the work of these three, and if you hire one of them, I know you'll be pleased.