Best Equipment Stand

Tom, you mention the need to level.  I can understand that for your turntable, but remember that a three legged rack, such as the Star Sound Apprentice is alway with all three feet in contact. Of course the design of all the Star Sound devices is to get the vibration to the floor and to the Earth. They would not be good for foot falls. 

The old Stillpoints component stands and pipes can be used as a two level  rack that is fairly cheap using Ultra Minis. Stillpoint technology is somewhat helpful for footfalls. You would not want to go over two shelfs high, however. 

One thing that I would discourage is wooden shelving. It robs the music even worse than rubber. There always is wall shelving but I've never had any. Vibrations have such substantial impact on fidelity that you really need to consider them.

I would give a call to Star Sound Technologies and see what Robert would recommend in that situation.  I have all Star Sound Sistrum racks, speaker platforms, and amp platforms holding my equipment.  The sound was immediately stunning and the speakers got dramatically better in about 10-14 days.  My speakers were not supposed to be raised off the floor as the designer said it negatively would impact the sound.  Tried it both was several times and I have to say he was wrong--the Star Sound technology is phenominal.  This allowed me to sell off most of my room treatments as they no longer made a difference.   I'm on tile covering cement floor, so it's different, but maybe there's a chance. My former rack was similar to what you have.   I bought almost all of this used on Agon, so my price easily fit your criteria--new, probably not.

There has to be some mechanism for dealing with seismic type vibration. Even the strongest most inflexible design rack will simply transfer the structural vibration very efficiently. In the worst case the rack will amplify the problem. I can appreciate the desire to organize and showcase the system but for the best sound in most cases the components should be placed directly in the floor using, at a minimum, some sort of footers or at best a mass on spring device(s).

I had the same problem with two turntables (Linn LP12 and a nice Rega) in my upstairs room with the hardwood floor. Tried several different racks, still could hear footfalls and the arm would actually jump around on the LP if you trod heavily into the room. So I had to move my system downstairs to my ground floor/basement level big room with concrete slab covered by wall to wall carpeting. Turntable dead silent now even if I "dance" to the music. I really think you will have to use the wall shelf to isolate your TT from the springy floor. Or pour a concrete slab?

I tried a wall mounted shelf one time and found that my walls vibrated as well. I tried hanging the turntable from the ceiling and found it also vibrated. I knew a guy in Chicago who used curb stones for a rack. These are the heavy stone used for curbing in that city. I have no idea how he got them into his room but the system sounded great.
I suppose mass is a key as are points.