This is part of why SpaceX is so focused on enabling recovery and reuse of their launch vehicles - the rocket costs an enormous amount relative to the propellan

This is part of why SpaceX is so focused on enabling recovery and reuse of their launch vehicles - the rocket costs an enormous amount relative to the propellant/launch site. As for the turbo pump only running for 30 minutes - if the launch vehicle it's attached to is going to destroy itself, why bother designing the pump to last longer, likely adding several pounds? "Oh, this new pump will last 100x longer than that old model - but you're just going to crash it into the ground at several hundred miles an hour, because recovering it would cost far more than just buying one more of the old model. Sound good?"