DR implementation suggestions.

We are migrating a small number of but critical workloads to AWS.
We have a RTO/RPO or 24/48 hrs to work with

To keep the costs low, we were going to spin up our DR infra and VM in a DR region and the turn them all off. The issue is if we need to restore RDS and a few of the VM, it will result in a rebuild of the resourses.

Has anyone setup the DR in IAC and then built the process that in a DR situation, spun up all the workload on demand and restores form the backups?

I kmow this would need a run through every 3-6 months to ensure we are still up to date a d relavant.

Has anyone investigated the DRS system AWS has just released?