I did it with two 13" TVs at a dentist's office nearby. I drilled thru the cabinet and ran two guy wire like cables, which I attached to the 2x10s above the drop ceiling. 20" would be a bigger deal. Offer to do 13" or, like James did, have a contractor build a box that they will slide into.
There is no truth anymore. Only assertions. The internet world has no interest in truth, only vindication for preconceived assumptions.
