Glad to see you're back.

With regard to the reduction in landing costs.

What are the difference in costs of a single launch rocket payload/delivery to it's target and a dual/multi-launch rocket with similar payload and target.

I presume some additional hardware is required on the multi-launch, of which some has to be serviced/replaced, on the dual/multi-launch rocket only.

But the majority of the cost is the basic rocket hardware, which must be far greater than any additional fuel required for the subsequent reuse, even allowing for any additional hardware and fuel required for the multi-use.