I've decided to go with the fulltime suction cups and use bungee cords while traveling for added security.
I won't need to drill any holes or use any adhesive. I also won't need to set the tv and microwave on the floor every time I move the trailer.
The broken tv I mentioned earlier happened because I was in a crowded campground and a much nicer spot opened up which was closer to the bathhouse and further from the dumpster. In my haste to grab the spot, I totally forgot about the tv.