One of the main reasons this hasn't been done before is because the initial cost is very large.
Times, Sunday Times (2013)
People are adding more than a third to the initial cost of their holidays by splashing out on new clothes for their trips, a survey suggests.
Times, Sunday Times (2013)
It was set up as a partnership between Britain, Germany, Italy and Spain, with an initial cost for British participation of £7 billion.
Times, Sunday Times (2011)