You can try to rent a VPS from OVH, they offer Windows 2012 R2.
https://www.ovh.ie/vps/
Remember, Windows uses more RAM than Linux just for the OS.
You can read more about Windows and Linux here:
https://otland.net/threads/introduc...o-look-for-and-what-companies-to-pick.230250/
You could give him some alternatives instead of just saying its 2x more expensive than Linux.
Linux is a free, you only pay for the dedicated/vps server when you use Linux, if you want to use Windows you need to pay for a license aswell thats why the price gets higher on a Windows server.