I need to have a VPS hosted in some cloud like AWS that includes : Odoo 13,  Windows for some Windows Apps and File server for all business files for all users. 10 users will be using odoo, 3 users will use windows apps with Remote desktop Access, all sharing files from their PCs. 

What is technically recommended setup?

1- Ubuntu Server  to install Odoo(linux) plus Ubuntu file sharing, and Vbox for WindowsOS+apps

2- Windows Server  to install WindowsOS+apps and VBox for odoo-linux. With windows File sharing.

3- Windows Server to install  Odoo(Windows) and Windows apps, and file sharing. 

Thank you