Multi-Platform E-commerce Website Development

I nead help whid 5 to 20 webside totall, we will deside if server is in my home, azue or your private. I want to sell mobilephone,pc, ps2 ,to ps5 ,xbox, travel company, yellow pages on norwegian, and others... (Budget: $30 - $250 USD, Jobs: API, Azure, eCommerce, HTML, PHP, Web Development, Website Design, Website Development)