Robust Defence Fare Flight Booking Platform

Hi I need a low-cost but scalable white label B2C flight booking portal + Android app mainly focused on defence fare flight booking. Main Goal: Build a trusted and competitive defence flight booking platform that provides the best possible final payable ticket price in a smart, transparent, and practical way without fake discounts, hidden charges, or misleading pricing. Main Priorities: - Competitive final payable ticket price - Defence fare support - Low startup cost - Fast launch - Professional OTA experience - Transparent pricing structure - Long-term scalability Preferred Inventory Sources: If possible, preferred inventory providers are: - EaseMyTrip inventory - HappyFares inventory or similar competitive inventory providers with good defence fare support. Preferred Development Approach: - Ready-made OTA framework/customization preferred - Avoid unnecessary custom development initially - Website first + lightweight Android WebView app acceptable initially - Inventory-based setup preferred instead of expensive direct airline API integrations - System should support future inventory/API additions without rebuilding the portal Required Features: - Flight booking portal - Defence fare support - Regular/public fares - Responsive mobile-first website - Android app - Admin panel - Payment gateway integration - Booking/cancellation/refund management - Convenience fee & markup control Important Fare Logic: - Cheapest available final payable fare should display first - Multi-source inventory support preferred - Smart fare selection logic preferred only if already supported by existing OTA framework - Route-wise markup support - Airline-wise markup support - Separate convenience fee control Important Technical Requirements: - Complete admin access required - Full source code access required - Source code must be complete, editable, and independently deployable without hidden licensed dependencies from developer side - All server/domain/deployment credentials must be shared after project completion - Portal branding/domain/app ownership must remain fully under my control - Hosting/server/domain/payment gateway accounts should preferably be created under my own ownership and contact details - No permanent dependency on developer after delivery - Future provider addition support required - Deployment/setup support required Important Note: I currently do not have my own agent ID/inventory account, so I need guidance for the cheapest and safest workable setup. Transparency & Anti-Scam Requirements: Please clearly explain: - whether inventory/provider adds hidden markup or backend fee - reseller vs direct inventory structure - minimum balance/security deposit requirement - monthly/annual charges - booking commission deductions - cancellation deductions - maintenance/support cost - whether booking/ticket issuance will remain dependent on your company account or can later be migrated fully to my own inventory/account - whether fare changes, hidden checkout fee, or delayed price refresh issues may occur during booking flow - which features are already available in your existing OTA framework - which features require extra custom development Please do not promise unrealistic “MakeMyTrip-level” systems if the setup is based on ready-made frameworks. I prefer practical, transparent, scalable, and low-maintenance solutions. Please send: - Previous OTA/travel portal work - Live demo if available - Tech stack - Delivery timeline - Total project cost - Inventory providers worked with - Whether inventory credentials/agent ID will be in my name or yours - Estimated monthly running/server cost - Included support duration after delivery - Separate paid maintenance charges if any - Cheapest recommended architecture for this project Goal: Build a low-investment defence-focused OTA platform with competitive pricing, transparent operations, fast booking flow, and future scalability.