I would love to know how you (would like to) define it.
Luxury for those with taste (no fine pearls before swine) is carefully and thoughtfully crafted. Not expensive to price gouge, expensive for every step in caring for is taken, consideration made.
I too in my time have learned the art of living lean. When I have nothing I am vigorous by my apatites.
The only challenge is overcoming the inconveniences of the self. Do your future selves favors and that self will have abundance when that future time comes to pass.
Living on one’s own terms is the greatest luxury of all.
OTOH, I'm an old geezer with a modest lifestyle.
- everything just working, no paper cuts