Hi,
I would love to assist you with web app - I can build a sophisticated system that you are looking for your business. I can work out the options and propose the best solution that doesn't breaks the pocket but still provides a stable system with a great user experience.
Let's get on a chat if you are available and discuss a Minimum Viable Product or a prototype that can be launched in the first phase.
I'm happy to answer any queries that you may have.
Wishing you the best of health and success.
Thanks and regards,
Akhlesh Singh