How much space between cables is enough?

Researching the idea of suspending cables I came across a post on another site about using rebar chairs for this.  They come in different sizes and look like they would enable the rubber band trick.  Cheap hack if you think it would work.  Personally I doubt I could hear the difference but if I ever get things settled down enough that I'm not always moving stuff around I might give it a try. 

https://www.homedepot.com/p/Hercules-3-in-Rebar-Chair-100-Pack-912/204220121

And rather than buying incredibly expensive audiophile vibration isolation gadgets I would love to know why these guys wouldn't work almost as well:

https://www.supplyhouse.com/sh/control/product/~product_id=MP-3E

If I thought I could hear the difference, I might be willing to spend the hundreds to thousands of dollars on the fancy vibration isolation gizmos but I'm pretty sure I wouldn't.  I will say that putting those  E.V.A. Anti-Vibration Pad's under my subwoofer improved its sound immensely.  Instead of the booming rumbling unmusical beast it was, it became tight and a pleasing companion to my Magnepan 1.7's.  But putting those same pads under the 1.7's deadened the sound.  It makes sense that tube amplifiers should have vibration isolation so I have them under that too.  So I agree, listen and you may know, but some of us operate with more of a budget constraining our options.  I'm getting the Tekton Moabs in 5-6 weeks and it will be interesting to try the EVA pads under them.  Probably they will deaden the cabinet so I'm thinking of having a board or granite slab resting on them and the Moabs on top of that on spikes.  That is a more realistic option for me than throwing $600 at the  Isoacoustics Gaia II Speaker Isolation footers.