I am having troubles deciding about building a wood fire oven.  We have a large 4 inch thick slab behind our house that was supposed to be used for a porch, but the porch never got built.  Is 4 in thick reinfoced concrete thick enough?  The Bread Builders book said 5 1/2 inches.  We do live in Texas so I am not worried about freezing.  My other problem is I am not sure I can actually build it.  Should I consult a mason?  Where do I find one?  My other concern is what if we move.  It is not in the plans for the next 5 yrs or so.  But would it be better to build it on its own slab so I could pick it up and move it?  I just would really love one, but I am not sure.  I have been checking out all the websites listed on the other threads, have the Bread Builders book and Building a Wood Fire Oven book.  If I take the plunge I will buy a set of plans from OVen Crafters.  Just wondered if anyone else here was turning this decision over as well.