Would an MSA yield sufficient results as well? Seems less invasive than full orthognathic surgery.

https://www.youtube.com/@JawHacks

Depends on what exactly is going on with a given person's airways. Expansion is the best treatment for poor nasal breathing, but if you're got a narrow pharynx going on also, you probably need that MMA.

My dude, Alfaro charges prices that are vastly out of reach of anyone not made of money, and I'm at a point where making Dr appointments in the first place, nevermind coordinating travel, pushes me to my limits.

I can probably get it done under public healthcare where I live, but I don't know if I can afford orthodontics, even if it's "only" a few thousand bucks over here.

Just wanted to share a cheap suggestion that has helped me with poor breathing due to narrow breathing passages. This was temporary due to bad respiratory virus, but was effective. Nyquil and breath right strips. Probably using NyQuil every night is not a good idea, but could perhaps use on occasion, or some other nasal dilator drug such as asthma medications/ steroids. But the breath right strip can be used all the time, and it really does open up your nasal passages noticably in my experience. Maybe worth a try.

Already doing all of these, I've even reverse engineered a custom, a bit more effective algorithm into my PAP :-P But thank you for the suggestions.