Well you certainly seem to be determined anyway?
Ok James. Would you not, at least wait till next summer till you at least have a proper set up. Maybe an enclosure within an enclosure, Incase it escapes. No point in having a mink, with no where go put it. Also, gives you time to get the proper licence, if that's even possible. But most importantly, you might at least get a young mink, that has the possibility of being tamed. Getting one from a den is ideal, but how you gonna achieve that? Next best thing, would be to catch one when it's just big enough to follow the mother. You would have