I subscribe to the conspiracy theory that they were originally created at least in part to take money gained through illegitimate means and turn it into crypto. The fact that you propose to do it with legit money is fine and good, and is a better use of the whole NFT process, and I hope fervently that people see your way and not mine when government inevitably sticks its bear paw into the beehive and starts rooting around
the fuckery with nfts is speculation games. I've never seen it convincingly explained how nfts can disguise the origin of money.
laundering in the fine art world goes dirty money -> auction house that all maintain anonymity as standard practice -> loan at the bank that accepts artwork as collateral -> clean money
if you are just selling worthless crap at an exaggerated price you want a cash business, not a blockchain creating a digital paper trail for feds to root through. and no bank is going to accept your nft as collateral.