WordPress Multisite Multi-Tenant Setup

I need a robust WordPress Multisite (WPMS) network that lets me spin up and manage many tenant sites from one core installation. Each tenant will publish news-style and other media-rich content, yet they must also be able to sell digital or physical items directly from their own storefront... (Budget: $750 - $1500 USD, Jobs: Containerization, DevOps, HTML, MySQL, Payment Gateway Integration, PHP, REST API, Web Development, Website Design, WordPress)