Now there's a business opportunity!
A giant barge. Pick up houses in Florida, truck them to the barge. Move barge from Florida to the UK (with the Gulf Stream, you wouldn't need that big a tug) Put houses (now in the UK) on truck and
move to new location. Voila! Cheap Houses.
And before too many people scoff at this, check out this link for
Nickel Brothers. I live in a part of the world where houses get moved all the time. And because so many communities have water access, they get moved by barge mostly. The expensive part is getting the house to the barge, and then from the barge to the lot. And by 'expensive' I mean - still a lot cheaper compared to the cost of building a house.