N + 1 = Out of room, so I bought a Delta Cycle Michelangelo rack off of Amazon that was on my doorstep today. It stacks two bikes vertically, it's free standing and I was able to perform an assembilism with a phillips screwdriver in about 5 minutes, sturdy, well built, and all the screw holes are pre-threaded and line up. Not junk and 100 lb capacity according to the paperwork that came with it.
This is not my photo or my house because my office is a disaster.
: Mike