So how much dollars I have to spend if I want 3 copies of each UR in this box?
I've spent all my gems on Invoked and Shiranui so currently I don't have any gems left.
You have to dig 3 times through the whole box in worst case. Not sure if it's 180 or 200 packs, but this will lead to 540 to 600 packs you need to spend between 27000 and 30000 gems in worst case (on average you have to spend slightly less but you probably won't save much more than 20 packs / 1000 gems)
I spend cash when they have deals like the reopenables and guaranteed UR. Also structure decks. You can get a lot of the cards you want by taking advantage of sales. I dont know if that makes me a whale since I dont spend a huge amount but I love the game and it keeps new content coming so whatever