it seems We've had the same thoughts, Where the Hostel we would want is not really set in stone.
I lived in Greece the last 10 years but was born in the California. and Grew up in Central America and traveling in general.)
It would seem to me that the 'exact location', actually does have a lot to do with it however as i dive more into the research.
as you try and figure out upstart costs and permissions from local governments. IE they'll all be very different depending on the friendliness of very local authorities, not just the things that would be same everywhere, (online marketing and gravity of the tourist attractions, cost(desirability) of travel to that spot, etc)