WooCommerce Coupon & Discount Setup

I’m ready to roll out a full-featured discount engine in my WooCommerce store and need an experienced developer to configure it from end to end.

Scope of work
– Automatic tiered discounts (e.g., 10 % off orders above $100, scalable to any threshold I define)
– “Buy 1, get 1 50 %” and similar mix-and-match promos that trigger correctly in the cart
– Visible badges on every product card such as “–20 %”, “Sale”, “Best Seller” so shoppers instantly see the offer
– Coupon management: promo codes I can create on demand, first-order incentives, and countdown-based flash deals
– Seamless promo-code input field on the cart page with real-time validation
– Dedicated “Sale” archive that automatically pulls every discounted item
– Countdown timer component for limited-time promotions, adaptable to any campaign length

Please include in your proposal:
• A short outline of the plugins or custom code approach you recommend (e.g., WooCommerce Dynamic Pricing & Discounts, Advanced Coupons, custom snippets) and why they fit best
• Your estimated timeline with key milestones
• A ballpark cost broken down by setup, testing, and launch support

All pricing rules, discount percentages, and creative assets will be supplied by me. I just need a reliable build, clean configuration, and clear hand-off instructions so I can manage future campaigns without developer intervention.