Think of all the trickle-down wealth generated by employing oiks who quite like boats and know how to read a chart to sail them for the wealthy owners.
Main yacht - fine
Commuter yacht - fine
Weekend yacht - you’re taking the piss now.
You need the weekend yacht if your main one is moored say in southern Spain and you cba’ed flying down at the weekend. It’s pretty much a necessity really.
Just out of curiosity, how many yachts is too many?