You have to create a custom image of Windows Server 2012 R2 and import it to AWS EC2 so that I can launch instances using that AMI or export the image anytime from EC2 if for some reason I want to migrate from AWS.
Remember, EC2 doesn't allow to export AMI without importing it before. I'll provide you EC2 credentials & Windows Server 2012 R2 license if needed. Besides, you'll show me how to import & export it.
It shouldn't be a tough task for an expert. Please bid less & i'll give you bonus if the job is done perfectly. Besides, i'll hire you for other Sys Admin/AWS tasks.
If you can create & import custom Linux (CentOS/RHEL) images, that's a plus point.