@Hope-And-Dave0 Just because your property is listed on Airbnb, it doesn't mean that you have to make your family and friends book it through the website. You're still free to make your own independent arrangements with people you're already in contact with, if you feel you know and trust them well enough.
I guess the nature of your relationship would be the best guide for what to charge. Some people you're eager to see and would happily host for a few days for free. Some relatives, you might be tempted to charge double.