Yeah, that is kind of what I am planning, only using elbows instead of angle cuts to put it together. It will be scaled down a bit, it will fit on my 70qt cube cooler and only be 2 tap. I hadn't thought about putting in a hinged door, that is pretty neat.
The cooler will hold two 3 gallon kegs, for about 60 beers. I want to make this tower so I can easily move it to a bigger, trash can based kegerator, that will hold two 5 gallon kegs to server 100 beers to thirstier crowds when needed.