Live Open/Closed Status Retail App

Simple Shop Open/Closed Status App

I need a simple app that allows shop owners to indicate their current live status — whether their shop is OPEN or CLOSED.

The basic functionality I need:
- Shop owner can enter their credentials, adress, location, type of shop (barber, grossary, saloon, etc)
- Phone Location can be tracked within a certain range (ex: 50m) to determine weather the shop owner is inside the shop or not, to determine the availability of service
- Shop owner can log in to their account.
- They have a simple Open / Closed toggle or button.
- When they change their status, it updates immediately.
- Customers can view the shop's current status.
- The status should be clearly displayed as Open or Closed.
- The shop owner should be able to change the status at any time.
- The status should remain accurate if the app is closed/reopened.
- Ideally, include the time of the last status update.
- Simple, clean interface — no unnecessary features.

I am looking for someone who can build the complete working app, including the backend/database needed to store and update each shop's status in real time.

Please include:

1. Which technology/framework you would use.
2. Estimated development time.
3. Total cost.
4. Whether hosting/deployment is included.
5. Whether you can provide the source code when completed.

This is intended to be a relatively simple MVP, so please don't over-engineer it.