The AWS Secure Environment Accelerator is a tool designed to help deploy and operate secure multi-account, multi-region AWS environments on an ongoing basis. The power of the solution is the configuration file which enables the completely automated deployment of customizable architectures within AWS without changing a single line of code.
Why do you think that https://github.com/PaloAltoNetworks/aws-elb-autoscaling is a good alternative to aws-secure-environment-accelerator