Authors Joanna Sugden and Aditi Malhotra quote the British medical journal The Lancet when they state that having a baby in the US with a surrogate costs about $250,000. In fact it is more like $125-150,000. This inflated number was used to compare to the $25,000 they quote for surrogacy in India.
The US is the safest place to conduct a surrogacy, not only because of the excellent medical facilities and technology, but also because of the relatively stable regulation.
http://blogs.wsj.com/indiarealtime/2015/11/17/foreign-couples-in-limbo-after-india-restricts-surrogacy-services/