All you need is 47 solid clay bricks, which cost $0.90 at Home Depot, and two 12 x 12-inch pavers, which are $1.98 each ... Building your brick oven on a solid concrete floor is ideal, but you can set ...
If you would rather not lay plastic on the ground, use cardboard or a thick layer of newspaper ... Or, you can use bricks or pavers to create a barrier under the fence, much like with the mulch idea ...