I mounted a TV in the guest BR last summer on the wall using this bracket which only required one stud. It holds TV's up to 55" but my TV was only 42". I found there is a combination of wood and metal in my CYV built in 2011.
Near the top edge of the closet door was metal, but about 18" above the closet my stud finder found wood. I mounted the TV there, but was maybe a foot higher than I liked. Then when I went to bury the wires using a kit I bought from Home Depot, I found metal studs to the right side of the closet after I had made the circle hole and ran my arm down the wall a bit. I was able to move the wires a little higher and missed the studs. It came out pretty good and the wall mounting bracket was only $26 plus free shipping on Amazon.
Amazon.com: Mounting Dream MD2377 TV Wall Mount Bracket for most of 26-55 Inch LED, LCD, OLED Flat Screen TV with Full Motion Swivel Articulating Arm up to VESA 400x400mm and 60 lbs with Tilting: Cell Phones & Accessories
If you have doubts you can always call Villages AV, I used them to help with my attic antenna when I had trouble finding the right cables from the Directv cables. They are pros at mounting TV's and burying wires.
Home Audio Video Sales & Installation in The Villages, Florida