James Biden, Sleepy Joe's brother, owned and sold part of a crummy undeveloped 1 acre lot on Water Island. Which would mean nothing special until Q asks "Who owns the surrounding islands [close proximity]? Unique skill sets of Maxwell? Submarine pilot [unusual]? Helicopter pilot? What benefit might that serve?"
Eight miles apart by sea. Probably just another coincidence...
Good dig, bigbob!
Watch the Water (Island), hmmm?