RLYMN
You can have an offsite/DR site also act a functioning replication site with actual workloads on them from the production site with replication every 5-10 seconds using a product called Zerto,
Don't get me wrong, Zerto is some cool tech, but in a real world with real IO, good luck getting a Application quiece (like VSS on Exchange) to EVER close that quickly. I REALLY hate sales demo's with vendors as they show the most unrealistic scenario's and then partners/implementers like myself get asked why replicating all VM's ever 15 seconds isn't possible without all flash storage...