Or just do more morning handstands like I've been doing for decades without any ill effect, and ignore your unsolicited unnecessary prescribed solution for a nonexistent problem. I'll spend the money and space that would be wasted on gymnastic rings on something more generally useful, thank you very much.

I have a powerful aversion to introducing any generally unavailable facility to my daily fitness maintenance routine. Practically everyone I know who has gone down that path has a tendency to turn it into an excuse for not maintaining their fitness. Out camping? Oh shit, I don't have access to $dependency, guess I'll be a lazy slob today. Late for work? Oh shit, can't make it to the gym today. Pandemic? Oh shit, can't make it to the gym and exercise anymore because it's closed.

Nope, nope, nope. Every time you advise someone to introduce an additional dependency into their fitness maintenance, you're arguably lowering the probability they will consistently perform it. Quit it. My personal dependency threshold stops at a wall and some floor/ground space. Even this has become a bit annoying when I'm sailing, but I have found I can still manage stabilized handstand pushups below-deck with my feet braced against the low ceiling.