Having had the Four Winds version of 22e, I went through the same agony of trying to find a secure way to mount a 26" flat screen in the bedroom. There is nothing worthy of support in the inside wall structures. The best solution I came up with was to spread the load by bonding/screwing plywood to the wall spanning at least two studs then screwing the mount to the plywood Never followed through, got rid of it and bought a 29fe.
Making a smooth transition to senility for over 70 years
2017 Freedom Elite 29fe
2015 Jeep Wrangler Toad