I essentially have no wall space in a room I'd like to have a wall bed installed (first photo is an example of the room) in a room that's doubling as a den

. The one wall that could work, has two small windows that I just wish weren't there. I'd like to cover the entire wall to create the illusion that there isn't a loss of space in the room due to a large structure protruding 2 feet out from the wall but the wall bed lady says it's not possible with the way their wall beds secure in place . She came up with a twin bed design (I want a full or queen) in the second photo. I found a design (3rd and 4th photos attached) that I like. Do I need a contractor? Would love some help finding someone or just advice on best way to attack this. Thank you!!