Thanks ladies, most of the reasoning you have all pointed out WRT DoH are issues I had. I am trying to open minded about it, I know not everyone through DoH is, but there are so many dodgy tennants through DoH. (So sorry if I have offended!)
With my Bro's friend we will be going through the RE anyway. If he rents, it will be through the real estate because we will be 900km away. I want the RE to be in charge.
I have a gut feeling we should go with Bro's friend. I know if we went with DoH they would be responsible for any damage or lost rent, ect, but I still have reservations. I just can't explain that well to DH or with sensible reasoning, to him having a gut feeling isn't good enough. Though lately I have noticed I have been trusting my gut and it's always right. If I can get Bro's friend to pay the full rent and sign a 1yr lease, DH will be happy.