Hi ! I read your descriptive line above, You need to implement Database offline but not on local machine in your POS.
Recently, I have delivered Automation Program for Setup And SQL Server Installation, Database Creation for a RESTAURANT POS (UK). you can see review regarding this in my profile page. So, I can Suggest you for the same but i need to ask something before suggestions.
I have more than 10 years of experience in .NET, C# Programming, SQL, Microsoft SQL Server, jQuery, ASP.NET, MVC, WinForms, WPF, Entity Framework.
You can have a look on portfolio items screenshots in my profile page.
I need to know more like how many pages and if any other processing is to be implemented. It will my pleasure to see your message in chat box to discuss on these.
Thank You
Maroof K