They don't cost that much Dust. Dismantle unnecessary Eververse items like unused ships, sparrows, armor, shaders, arrival effects, etc. Do Eververse bounties when you have tickets. Equip Okular and grind engrams. You've got plenty of options to get the small amount of Dust needed to reacquire your arrival effect. If this was pre-Forsaken, I'd be right with you, but as it is now, the system is more than good enough to handle your "if".