Resolve WooCommerce 503, Bot & Cloudflare AND AIRLIFT

My WooCommerce store keeps throwing a 503 Service Unavailable error at random times during the day and it is crippling sales. Stopping that error is my top priority, but the symptoms point to a broader... (Budget: $10 - $100 CAD, Jobs: Cloudflare, MySQL, Performance Tuning, PHP, Web Security, Website Optimization, WooCommerce, WordPress)