It's good to understand the different price dynamics and useful to have some rules of thumbs to avoid long cost calculations. For most startups I would actuall

It's good to understand the different price dynamics and useful to have some rules of thumbs to avoid long cost calculations. For most startups I would actually advise to start with Heroku, which is even more expensive than AWS (it is built on top of AWS). But you save on devops and building the CI/CD pipeline. For a small team it can make a big difference in terms of productivity. For worker workloads like CI, renting dedicated hardware (like Hetzner) is usually cheaper and produces more reliable results. spot instances also work but have less reliability dues to machines cycling. The main factor for keeping everything under AWS would be egress bandwidth pricing or if the workload spikes are bigger than 2x.