The problem is that maybe they will never be hooked if the oven you spend 500gbp on isn't delivering nice pizzas.
From what I have seen here and know by experience is that the blackstone, the pizzaparty and the p134h are really good "cheap" options.
I have spent money on other cheaper options without success. Lost money...
My suggestion would be to go for any of the three above or buy a steel plate for your home oven. Depending on how hot it can get you will be able to make nice pizzas in the 3 min 30 range.