I was just wondering if it is acceptable to justify my choice of case studies for my PhD on the basis that I don't have the resources to travel extensively. I have a choice of around 8 locations, all of which would be suitable for what I'm trying to do. I can narrow those 8 down to 3 on the basis of added value in terms of the type of data I would get. I would love to look at all three but that's not going to be possible. Of those, two are on the other side of the Atlantic while one is in Europe. I'm leaning towards the European one because I'll be making short week/fortnight long trips once a month and need to make every hour count. Going to Europe means i) cheaper travel, ii) no jet lag. Beyond that I'm really struggling to think of reasons why I should go there and not to one of the destinations across the pond.
Any thoughts/experiences with this kind of decision making?