Who sets the price and what stops the very wealthy from buying it all and selling it for a giant profit. The further we go down this train of thought the less market-like it becomes very quickly.
I have no idea how first use could work for water, would be happy to read more if you link me to something about it. A quick googling returned nothing.
The last one requires a lot more specifics to talk about meaningfully, but I'll bet that most of the free marketers wouldn't consider it a free market.