What I’m reading is this use case is for 3-5 days a week full time dev if you stick to off hours US time. That you can save significantly if you have spiky usage 1-2 days a week by going the ad hoc API route if you’re new and you need to install a bunch of monitoring tools to tell you how best to save week to eeek as your usage patterns change and you risk surprise bills in the 10s of thousands if you get it wrong.