PublicIPv4:InUseAddress

Here is another cost for running multiple nodes, public ip, vpc
PublicIPv4:InUseAddress
https://aws.amazon.com/about-aws/whats-new/2024/02/aws-free-tier-750-hours-free-public-ipv4-addresses/ if you have nodes ips like me you will pay for the second ones. There is no way around this you need an natgw for private ips.

we can use just one of them with a public ip and the others can share that ip 