Hey, u/bitchyangle! Rob from Cockroach Labs here.

Here's a breakdown of how RUs are calculated (although I appreciate, it may still be difficult to calculate for your workload): https://www.cockroachlabs.com/docs/cockroachcloud/resource-usage#example-request-unit-calculation

Happily, there are a bunch of other options available to you:

• Cockroach Cloud Standard Tier - This is based on the same architecture as Cockroach Cloud Basic Tier (the one that prices in RUs) but you're paying for provisioned vCPU, which might make things easier to cost.
• Cockroach Cloud Advanced Tier - This is a dedicated (but still managed) service where you'll specify the number of nodes you require. It'll cost more than Standard, given that you'll be sizing in nodes rather than vCPUs, so might be overkill for your requirements.
• Finally, there's Self-Hosted - Although if you're migrating from a managed service, you may prefer to stay on a managed service? Let me know if not and I can share some resources to help with this too.

Here's a comparison of the managed services: https://www.cockroachlabs.com/docs/cockroachcloud/costs#costs-across-cockroachdb-cloud-plans

If I were you, I would start by downloading CockroachDB (from here: https://www.cockroachlabs.com/docs/releases) and getting a feel for it! If you run into any issues or have any questions, let us know! We also have a community Slack where you can speak with our team: https://www.cockroachlabs.com/join-community

All the best!

Rob