I voted 8. However, inside the home there are two. The main TV is in the family room and the second, viewed about twice a year, is in the master bedroom. Both are connected to the internet via AppleTV. For TV, we watch only Hulu and Netflix.
The other 6 are in the RV, parked in the shop, next to the house. It has two in the main living area...when parked and watching a DVD, both of these are usually on because of the layout of the RV making it hard for both of us to watch the same TV. Then there's one in the master bedroom, that is watched sometimes. Then there are two bunks, each with a small, 16" or so TV. Finally, there is one outside. This one was the only one that we ordered as an option. All the others were included in the floor plan we chose. We had it added not because we wanted it per se, but because of resale value...I've never even seen anyone watching their outside TV, but everyone with a nice diesel pusher seems to "need one". So just to make it easier to sell when the time came, we ordered it.
Our other home in Nevada has one, only in the great room. This one is also connected only to Hulu and Netflix via AppleTV.