I love how easy it is on SB for someone to ask about a choice they are contemplating, and their question solicits NOTHING about the value or price of the choice (and offers no information about their financial situation - they could be a multi-billionaire for all anyone knows), and get a raft of responses that tell them their choice is bad because of value or price....
Knowing several multi-millionaires, most of them became multi-millionaires by intelligently spending their money based on value of product or service, not frivolously spending their money.
For snorkeling, buying Force Fins is not a valuable return on investment based on the situation he described. It would be frivolous to outfit even one person with a new OR used set of Force Fins, let alone an entire family, when his needs are more intelligently served by such an obvious alternative.
Funny that you lament people offering Shearwater as a solution for somebody who only needs a $200 computer, yet when the same thing occurs here, you get your underwear in a bunch.