Well for me the flights are only £60 return thanks to cheapy airlines like easyjet and ryan air. We haven't sorted out hotels yet but you can get them at around £20 a night for a very basic room. if you are in the US you can get flights for around £300 to £400, Well thats what the cheap flights from the Uk to America cost so I guess it would cost about the same from US to Amsterdam.

Might go a shrooming although I object paying for shrooms as I have so many in my freezer!