How much will it cost to continually clean a stubborn stain on clothing? Is it more economically viable to buy a new piece of clothing? Is it a viable business model to build upon?

You can try wrapping your clothes in plastic like how they always wrap it around your dry cleaning clothes after you sent it for dry cleaning. The stains might be due to mildew cos of the moisture inside the cupboard. You can wear them frequently too to prevent stains or wash them once in awhile.

If you store it in a vacuum: never

the stains should be microbiology (molds?) and dandruff (?)

You can it bring to the laundry everytime you find stains.

Better yet: use your clothes, then you have to laundry anyway.