Okay, so from my perspective, I believe that sometimes Fuku is worth it till a point, like 5k or 10k. This one would only be worth it if you could spend for all the rewards, like 30k. Unfortunately because you don't have 30k, and in my opinion the only event worth of coupons is lucky stars(but even this one is so and so), I would advise you to save more and wait for better rewards.