Theres so many things to consider in mining. Electric bill, Internet connection and government. I think you have to find a country which has cheaper electric bill rate and a having a speedy internet connection on a cheaper price. It would be a great advantage if youre on a natural cold countries like Canada or Japan. You also have to consider the labor work rate for your personnel in the farm. And last but not the least, check it first if the country youve decided to go is accepting and allowing bitcoin in their country. Good luck!