If you are comfortable using AWS , You could us AWS Batch (free) with Spot Fargate jobs with Cloudwatch cron as the trigger . You only pay for the vcpu hours your job consumes https://aws.amazon.com/fargate/pricing/ , it’s a set it up once and forget it model.

You could use lambda if your runtime is expected to always be less than 15 minutes Batch fargate jobs documentation - https://docs.aws.amazon.com/batch/latest/userguide/fargate.h... Cloud watch cron documentation

https://docs.aws.amazon.com/AmazonCloudWatch/latest/events/S...

https://aws.amazon.com/about-aws/whats-new/2018/03/aws-batch...

Everything can be deployed as a simple cdk app once you have your code ready in a docker repository somewhere . There are no servers to maintain and no ongoing maintenance will be necessary