Very nice! I don’t find this a one up but I love the ingenuity. I managed to salvage this NUC from work because we shut down a zoom room from a agency we acquired at work and then disposed all the unneeded /nonuniform hardware. Before that point, I was looking at doing something quite similar to you.
I also had to use get an hdmi dummy plug. That was an annoying stumbling block. Just, why??
I recently got a TCL TV that has Google TV on it. The reason I chose it, even tho it’s not the highest quality 4K capable TV, is that on first boot it gives you the option to choose dumb TV or smart TV modes. Have never connected it to the internet. Maybe you would have some luck looking into that!