Varian, this sort of expenditure is normal for these sort of visits of Heads of State of other Country's. Full State visit's cost vastly more than that. The visit of the Pope cost 7 million. It is reciprocal though when our Head of State or representative go to other Country's they are protected at the cost of the Country they are visiting, which will be of a similar level of expenditure one has to assume.
Interestingly Trump is not the first president to not receive a full State visit Bush visited again in 2008 when he stayed at Windsor Castle. In 2003 between 110,000 and 200,000 people protested about Bush's visit and Vietnam veteran Ron Kovic toppled a five metre-effigy of the president. So a 'blimp' is quite a modern ""Bush visited again in 2008 when he stayed at Windsor Castle but that was not a full state visit. In 2003 between 110,000 and 200,000 people protested about Bush's visit and Vietnam veteran Ron Kovic toppled a five metre-effigy of the President.