They each have 4,000 square feet of floor space, including a Presidential suite with a large office and conference room, a medical suite that can be used as an operating room and two kitchen areas that can feed 100 people at a time.
'I'd like to see them be able to work it out so it could go quickly, ' he said.
They will attend a black-tie dinner with Theresa May, before meeting the Queen in Windsor on Friday.
"There is no stronger alliance than that of our special relationship with the USA and there will be no alliance more important in the years ahead", May said ahead of the visit.
They are expected to be in Scotland until Sunday.
"I partially won an election because of immigration", he said, also pointing to Italy's recent vote, in which Giuseppe Conte took government after campaigning on a populist anti-immigration platform.
Fielding questions following the North Atlantic Treaty Organisation summit in Brussels, Mr Trump was asked his views on Britain's withdrawal from the European Union, suggesting it may deliver a softer Brexit that was not what the public wanted.
He said: 'I am going to a pretty hot spot right now with a lot of resignations'.
Britain "is in somewhat turmoil", Trump said before departing Washington, remarking that dealing with Putin might surprisingly be the easiest part of the European trip.
After spending the night at the USA ambassador's official residence in Regent's Park, London, the U.S. president will join the Theresa May at a military base on Friday to view a joint counter-terrorism exercise involving United Kingdom and US special forces.
Permission has already been granted for the 20ft high balloon caricature to be flown over central London on Friday, as Donald Trump arrives in the UK.
Mr Trump will spend the weekend in Scotland where he has two golf courses and plans to play at least once.
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