Completion of the site on the Laravel PHP

There is a working draft. Need to accompany him. To correct errors/rework. Work is not constant. There is a problem – evaluate it and write the cost.
Please send references to projects.

About the project.
System of B2B. There is interaction with the internal system via the Web API.
On the website it displays:
A list of documents of the client (payment, shipment, orders...)
You can see available product and to discharge him.
Edit orders (add/remove item)