I don't know about your family, but there's no way I would expect my parents, my sisters, their spouses and their kids to pay $10/ea for a service like this. Someone just wouldn't show up, which kind of defeats the purpose.

If it was valuable enough to us, I could imagine paying a reasonable monthly rate (say, $25/mo or less) to host our entire family... but disposable income varies wildly in our (and I'm sure most) family.