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How much disk space and which disk are you provisioning. Typically you want to go for the smallest size GP3 (you can grow your volume, use EFS or another storage strategy) Also consider if you have a NAT GW this will cost you money. I think the best place to start is - MFA on your account Billing Alerts Come back to us and tell us what you want to host and we can tell you what could be “cost effective” More on reddit.com

It's not mandatory to attach a public IP to an EC2 instance. You can simply attach an ENI with only a private IP which doesn't cost anything extra to the instance cost. It's typically bad practice to put public IP's directly on instances anyway. Typically you'd put an ELB or CloudFront in front. If you try and scale on 1 public IP per instance than of course costs will linearly increase. NAT Gateway is the easy way to scale, or roll your own NAT instance and then you can reuse it for outbound across many instances. More on reddit.com

EC2 instances are paid by the amount of time they are turned on. 1-hour cost $0.044, 1-month is aprox $32. You can see it clearly here https://instances.vantage.sh/aws/ec2/t3.medium?currency=USD&duration=monthly So it doesn't matter if the instance is receiving requests or not, as long as it is on, you are paying for it. Theen, you have all the other small charges, like data transfered from your instance to the outside, public IPs in use, etc, and some others not so small, like if you deployed a Load Balancer in front of your instance, that's hourly cost as well. You can ask Gemini, Copilot, ChatGPT, about the break down of costs of what you created, they can probably give you a good understanding about it. More on reddit.com