Custom Furniture Shop Website & App

I run a physical furniture store and now want a digital experience that lets customers design what they buy before it reaches my workshop. I need a responsive website and companion mobile app (iOS and Android) that share the same database so orders stay perfectly in sync... (Budget: $15 - $25 USD, Jobs: Flutter, Graphic Design, MERN, Mobile App Development, React Native, React.js, UI / User Interface, User Interface / IA, Web Development, Website Design)