I have an early-stage idea called “Spain seat Spain.” At this point the concept is still flexible, but the core aim is to offer a convenient way for people in Spain to secure seats—whether that ends up focusing on travel, events, dining, or another seating-driven use case. I now need a clear, actionable plan that turns the idea into a build-ready project. Within a medium budget range I’m looking for: • A concise feature list with must-haves vs. nice-to-haves • High-level architecture suggestions, including recommended front-end and back-end technologies, hosting, and any third-party booking or payment APIs that would fit a Spanish market (Amadeus, Stripe, local ticketing gateways, etc.) • Simple wireframes or visual mock-ups of the key user flows (home, search, seat selection, checkout) • A phased rollout roadmap showing milestones, estimated timelines, and rough development hours for each phase • Written notes on potential regulatory or localization considerations (GDPR, multi-language support ES/EN, currency handling) If you have direct experience integrating reservation systems, building responsive web apps, or launching consumer platforms in Spain, please highlight relevant projects or live links. I’m happy to answer clarifying questions once you’ve reviewed the outline above and can propose how you would approach delivering this blueprint.