Cheers sols.
I'm on the forno forum too, its got loads of great info, you just have to invest the time to look through a lot of threads.
I'll have a read through your build tonight.
Just to add to Ops question a lot comes down to what you want to use the oven for.
If it's solely for pizza then something like an Ooni would suffice. It's compact, economical and gets up to temp fast. It's major down side is it cant retain heat and is not suitable for any other forms of cooking.
The pizza ovens you are referring to (while called pizza ovens, they are actually "wood fired ovens") They require more fuel to heat and can take much longer to reach cooking temperature depending on size. They are also large and often need a brick constructed base to sit on.
The main benefit of them is not only to cook pizza but any thing else you would cook in a normal oven as well as BBQ, some can also act as a smoker but this is normally an addition to the main oven.
Like 200sols says good WFO can maintain cooking heat for several days and once fired require smaller amounts of fuel to keep up temperature so you could use it every day of the week if desired for minimal cost.
Another thing to note about WFO is they take a bit of practise to get the hang of. You need to check and maintain temperatures when cooking and each oven will have its own heat zones that you need to work around but that's all part of the fun.