amazon windows server 2012 users

i have started a new team based working enviroment, we needed, few vps (windows) so our workers can login and work on them, but since im adding more people into the teams, i need bigger workplace,

if any one can guide me, i want to have users on windows server 2012 each user will remote desktop login to its own desktop and use his apps installed.

i want to use one big amazon ec2 windows server and have all my members login from there locations using remote desktop

thanks