[zild3d]

Warm pools are a supported feature in AWS on auto scaling groups. Works as you're describing (have a pool of instances in stopped state ready to use, only pay for EBS volume if relevant) https://aws.amazon.com/blogs/compute/scaling-your-applicatio...

[zerd]

If you want even fast startups restarting stopped instances is apparently faster https://depot.dev/blog/faster-ec2-boot-time