The 40" TV is 1" wider than the wall on either side (wall is 34" and TV is 36" wide). You can use a surface mount TV mount in the bedroom but the living room mount needs to be offset from the wall or you need an extended arm to pull the TV away from the wall. This accomplishes two things:
1. Allows access to the thermostat
2. Allows the Bathroom panel door to clear the TV
The offset is not much - If you position the TV to be flush with the outside edge of the fireplace shelf, that is enough. If you chose a 32" TV, you could use Host's mounts or another flush mount instead of the extending style mount.
Apache Camping Center provided the TV mounts I used instead of Host. I installed the MORRyde TV1-025H 25 lb rated model using eight 1" lag bolts into the wall and they appear to be firmly anchored without additional wall board required. Samsung TV's use M8 hardware on a 200mm VESA mount - Although my MORRyde mounts came with the larger VESA plates, the hardware supplied was only M4 and M6 to mount the TV. I purchased M8x25 bolts and washers locally for the install and had to drill out the plates for M8.
http://www.morryde.com/products/69-extending-swivel-tv-wall-mount-smallHost uses ZAMP Solar for their inverter, panel and controller. I have three 160w panels and a 30A controller installed on my Mammoth. There is enough room for four panels on my roof because I do not have the large cabover skylight, but typically there would only be room for three. If you want more than three panels, you would need a larger controller and even heavier wires. In the basement is a 1000W PSW inverter with a remote controlled switch located in the control panel above the TV in the living room. There are two single gang wall outlets powered by the inverter: One is in the pantry which powers the bedroom TV and The second is above the fireplace which powers the living room TV.
https://www.zampsolar.com/rv-solar-products/