Here is a first project of what I think an average spouse would allow in the shared shave nook, his /HERS?
I was in a second hand store a week ago and picked up this goodie chest for a fair price. I do suppose that Ikea or other box stores have them also. They are made to be wall hung also with hardware installed to do so.
This one was made to hold 14 Straights and assorted other stuff while the main hoard is hidden elsewhere.



I did some figuring and made a thin board to fit into the top space and then laid out the holes for the magnets. Ooh the magnets !! are simple neodymium disks and can be had online very cheaply. Get ones at least 3mm thick 4x3mm is a nice size and cheaper by the hundreds.
Back to that board. I try to keep the holes at least ¾” apart and the same from edges. This for this box made two rows of five wide and one of four wide separating them back to front. The holes drilled, I set the magnets with J.B. Weld! sanded off the excess, painted, and screwed the board to the inside of the box at the top with three screws along the central row of four magnets.

So the straights swing like little bats and there is room for other razors and a puck and some blades.

As to the strength of the magnets, I can walk around the house with the straights hanging and bouncing off the back and sides.

Your ideas can make better, or other, or different, as these displays are all different when found in the wild.
~Richard
PS this is cross posted.
Another smaller display is to follow in a different thread. This is fun and I am not planning to keep the displays.