I run a fitness center and need a focused solution that lets me manage memberships strictly around payment processing. No workout plans or facility maintenance—just a smooth way to sign members up, charge them, and keep track of who has paid. Here’s what I’m after: • A web-based module (stand-alone, plugin, or SaaS setup—your call) that lets staff register members, assign a plan, and collect recurring or one-off fees. • Secure payment-gateway integration. I’m open to credit/debit cards, digital wallets, bank transfers, or any combination you recommend, provided everything is PCI-compliant. • An admin dashboard showing active members, upcoming renewals, failed payments, and a quick revenue snapshot. • Clear installation steps plus concise user documentation so my team can maintain it without outside help. • Well-commented code and basic error-handling/notification logic. The end deliverable is a fully functional, tested membership-payment system ready to plug into our existing website.