As noted above, there is enough value here such that AWS implemented this several years ago. Said implementation is appropriate for both personal AWS accounts and large scale multi-account organizations.

Having implemented this on behalf of others several times, I'll share the common pain points: * There's a long lead time. You need to enable Cost Explorer (24-48 hours). If you're trying for fine distinctions, activating tags as cost allocation tags is another 24 hours * AWS cost data is a lagging indicator, so you need to be able to absorb a day of charges * Automation support is poor, especially for organizations * Organization budgets configured at the account level are misleading if you don't understand how they're configured

What's really wanted here is that AWS needs to commit to more timely cost data delivery such that you can create an hourly budget with an associated action.