The core assumption is that minds have an intrinsic value. Future civilizations who don't share that belief are unlikely to engage in resurrection. But as far a

The core assumption is that minds have an intrinsic value. Future civilizations who don't share that belief are unlikely to engage in resurrection. But as far as cost is concerned, there is no reason to think it'll be in any way costly, especially if it's in the form of whole-brain emulation.