The paper mountain is...well, a paper mountain so its not level so I run the risk of knocking it over with that.
The only thing I can think of is to take the mattress and lean it up against the wall so I can move the TV tray with the sewing machine so I can have room to place another TV tray to deal with the weight. Plus, I'll be right in front of the TV :D. But I don't like the idea of raising the mattress and putting it back every single night. Guess its back to the drawing board.