Have you considered employing them as remote workers ? You will not have problems with timezone/office-hours if you employ in EU countries and moving can be a problem for some people.
Well, I would like to work with them in one office place.
I had freelancers working with me before and it worked fine most of the time but it's more about building something together here and learning from eachother. Maybe I should try looking on platforms like Couchsurfing for this matter, hm.