re: Recommendations on a folding / wall mounted squat rack?

+1 for the rogue folding racks . Built well and will last forever
Only issue with theirs is shipping cost.

I looked at the Ethos one as well but it had some issues that were not worth the price savings.
-lack of attachment options; non standard mounting patterns . The rogue unit has tons of available attachments and some other mfg's (Titan, rep, etc) attachments are interchangeable
- the vertical uprights do not actually touch the ground . It appears that all of the weight is supported by leveling legs . This does not seem like a good design

Titan's folding rack might be something to look at . My issue with that one was the lack of available mounting stringers and no room for adjustment height for the uprights in case your garage floor is not level