Food for thought... As far as costs... The DIR method/gear configuration is really no more expensive than all the doo-dads and clips. Some cave/reel line and a 1/2" SS bolt snap for the primary reg... $10-15. Bungee for the alt air source necklace... $1-2 a foot. Some more line and a 1" SS Bolt Snap for the SPG... $10-15. Even if you don't opt for the long hose yet (thought it's way safer that standard lengths)... these simple set-ups will serve you now... and all the way through your upper tech dive training. You'll spend way more $$$ shopping and waste way more time resetting/replacing all the plastic, rubber, and other "neat" products that simply become liabilities on the dive.
Part of the DIR mind set is standard gear configuration. Not necessarily brand loyalties, just consistent with configuration. Not everyone buys in to that. Some call it dogma. It does speak to a segment of the population though. Cops, Fireman, Combat Military, Medics, etc... In an emergency, you fall to your training, you don't rise to the occasion, therefore, consistency in your gear and the team's gear makes thinking simplistic. The application can save your life or your team's.
Recommend staying away from zip ties, break aways, o-ring doofers... they all fail... and they are always attached in a different spot, or they move around... but, using some cave/reel line tied and fused properly makes a secure attachment. Meaning that the item is exactly where you reach for it, in the exact position you want it, every time. Then, in the emergency, when your mental stress is high, you can rely on your gross motor skills and muscle memory.
I dove for years with different tricks and gear set ups. Went DIR in 2015, and literally have not had to purchase anything else, nor have I had to reset anything since. Good luck!