you are so dumb, probably a subscriber od Dgheied, the biggest propaganda clown of USA. Any XYZ deck is very expensive because it require 1 UR (xyz) from a different box. You want M7, Utopia, Ray, and so on, all on different main boxes or miniboxes. That never happened before, we used to have 2 or 3 decks embedded in a main box, now you can't, because you constantly need that single UR XYZ boss
Yeah I remember how you could get yourself a meta deck opening a minibox only (spellbook, fur hire)
Since syncros all decks became hella hard to build and that'll keep happening; 1 amazing extra deck monster in 1 terrible mainbox.
The cheapest xyz deck to build I can think of is with photons in this box, the xyz from here too and probably dysigma (sr mini) as your removal but still not cheap