The wall mount was quite expensive (around $175, taxes included at FutureShop) but offered the maximum flexibility. Rodger used a Peerless articulating arm for his TV
http://www.myroadtrek.homestead.com/SharpAquosTV.html. As for the TV connections, there is a 12 Volt plug still available. I could eventually use it for an other appliance and have a couple of small inverters that can easily fit in this tight space if needed.
Coming back to the cabinet, we keep the table in its actual position and simply rotate it when we eat. I used brass sash locks to give the cabinet a tight grip. It's much easier to remove the cabinet with these locks compared to having bolts and nuts.