I'm only new so i am reading all the posts.
If I had to leave my ferrets with someone i would hate to think that they had been put with 'others'
for one thing, I have noticed that we 'know' our ferrets but to many they look the same and in a crowd one bino looks like another and the same with the poleys
When i had to put my dogs in kennels for the one and only time,and it was for 4 days, each had their own space and by the time we had done we had a whole block and they had a paddock of their own to play in!
Plus boarding someone elses animal is a big responsibility, you have their health and safety plus many other things to consider, what about insurance etc. there are so many variables. I would really look deeply into this before doing it.