A little long winded here, but hopefully there will be some useful information for you.
What you spend on an oven is a key factor.
All depends on your pocketbook and enthusiasm.
I've had two WFO's and now have a propane one.
I spent a "lot" on my 2nd WFO and only used it every other Saturday, but I enjoyed it, and tending the fire.
As
R
Randy1
said, you need to consider the startup time.
My first WFO had double walls of metal.
It would get up to temp in about 90 minutes and could be used then.
The other one I had cement (or something like it) walls that were probably 4-5 inches thick.
It would take more than 2 hours to get up to temp.
Mind you by "up to temp" I mean 500-550f and does not count saturation of the walls.
That is suitable for most pizzas.
If you want to do Neapolitan, that's another story.
You need 850-900f and a longer startup time.
Wood is something you need to consider and investigate before you even think about an oven.
Can you get a "good" hardwood?
Do you have room to protect and store a cord of wood?
Oak is probably most prevalent hardwood, but will cost more than typical firewood you see on Craigslist.
How much is the wood going to cost?
If you buy a cord, chances are likely you won't get a cord.
They will try to cheat you. Obviously not all, but many small time sellers will.
If you know how much you should be getting and the load isn't right.
You can try to negotiate a lower price, or tell them you don't want it.
Wood was getting more expensive here, over $500 for a cord.
That is why I have a propane oven now.
As
R
Randy1
stated Pizzamaking.com is an excellent resource.
Lots of information there on ready made, kit, and DIY ovens.