New answers tagged design
Typically a wire product like this would be electro-welded together. Your set of criteria is going to be next to impossible to achieve. You envision something that has the properties of a fully welded structure but desire it to be a pile of loose parts. I believe that your best goal would be to make each level of your gadget an electro-welded assembly ...
Why don't you consider a free-standing TV stand, similar to this? This would easily handle a large LED TV up to at least 50", is easy to move and doesn't require covering your window. Covering the entire window with plywood then mounting an LED TV on it, and having it look good, will take some doing. I would think that you'd want to screw 3/4" plywood ...
I would strongly advise against trying to make an ad hoc mounting for a TV. Its a lot harder than you might think. Use a production mounting arm of some type. A typical example shown below: If you screw it into the window frame it will probably hold.
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