Tennis & Tecball Betting Platform

I want to launch a full-featured online betting site dedicated to both tennis and tecball. The platform must let players place single bets, build accumulator slips and enjoy live in-play wagering while matches are underway... (Budget: $250 - $750 USD, Jobs: API Development, Backend Development, Database Management, HTML, Laravel, Mobile App Development, Node.js, Payment Gateway Integration, PHP, Web Development)