Short of owning or otherwise having a helicopter at your disposal and a helipad on the roof, I don’t see how a boat service is going to be of much use to anyone not on the immediate waterfront if SHTF time rolls around again in Manhattan. Maybe passenger blimps need to make a comeback, lol. There’s some guy in Massachusetts selling personal mini-blimps but they’re really not all that compact, with a rigid frame so that’s not a possibility.