One wallet-friendly Costco run, seven nights of easy family dinners. That promise — from one of the most shared Costco meal planning frameworks in 2026 — captures the specific commercial reality that makes Costco genuinely transformative for the household that has figured out the weeknight dinner equation. Unlike fast food that costs $50 for a family meal, or delivery that arrives in 45 minutes for $60 including fees and tip, or the grocery store where dinner ingredients for