Singles cost a bit more sometimes but u need to be careful about what your deck theme is. Booster Packs can help a bit, not every card that is shiny or holo, is good. There are alot commons that can work really well with a deck if used properly.
Zombies, Dragons, Warriors, Spellcasters, get either one of them if you want a real challenge in the YGO game, add a few promos that supports your theme, and u might have a pretty good deck...for awhile.
I support Pokeshipping, Hoennshipping, Abilityshipping, Advanceshipping