Hi @Leanne1,
I'm not sure if this practice is appreciated, Ideally you should be refering your friend to join as a host on Airbnb and manage their own listing.
However, the best way to do this would be to create and add their lisitng to your profile. Add their bank account/payout method as well. I'm not sure if you cannot assign a payout method to a listing, I hope you can, if not, once a booking is confirmed, you can go to the transaction history section under the Account menu, then select future transactions, next to the bookings, you'll see a drop down box in column "Pay to" using which you can select your payout method, that way the amont will be transfered to your friends account.
In case your friend wishes to see the messaging as well, you can add their phone number too to your account, but that way they'd be flooded with messages related to your property as well, so you can avaoid this.
Once again, I'm aware that a lot of people manage multiple properties but recently I've read that
Airbnb is taking down properties which look more like commercial hotels, resorts or seem to be managed by an agent. So be careful before you start to invest too much.
I hope that helps 🙂