Can we move our existing sites onto one platform without rebuilding each one?

That's the typical path: rather than re-implementing every property, a migration consolidates the estate onto one instance,

That's the typical path: rather than re-implementing every property, a migration consolidates the estate onto one instance, mapping shared structure once and configuring each property's local differences. Most teams move in stages, prove the model on one property, then scale across the rest at the pace that fits the team instead of a single high-risk big-bang rebuild.