Yeah, you're probably right about it being more expensive, and much more difficult logistically, to do on a ship. The motivation for it was threefold: 1. Less

Yeah, you're probably right about it being more expensive, and much more difficult logistically, to do on a ship. The motivation for it was threefold: 1. Less environmental impact (no covering up a large swath of land). 2. No cost to buy the land. 3. Plenty of access to water. I hadn't even considered the possibility of moving the ships depending on sunlight conditions. That's really brilliant.