I don't understand. If autoscaling groups are too complicated, just create the instance and stop and start it when you want. You can control permissions via IAM groups and instance tags if you need to be careful. Or you can indirect through a lambda if you need to be super careful.

Good morning! `aws ec2 start-instances --instance-ids i-12345678900`

Good night! `aws ec2 stop-instances --instance-ids i-12345678900`