How would you sell (shares of) a painting via cryptocurrency?

Just received permission from a collector to sell two paintings via cryptocurrency. They are by one of the top 5 artists who regularly sell in the 8 and 9 figures.

So I pitched two ideas: 1) selling the first outright via cryptocurrency. The amount of bitcoin wallets alone with over $20m increases the potential buyer size greatly versus family offices, known collectors, etc. and 2) tokenizing up to 45% of shares with a discount in the second, the idea we collectively hold, creating an ROI through an outright sale.

How would you exactly go about this? For the first painting to sell outright, my plan is to create a landing page and share it every which way possible. For tokenizing, is it possible to do this without another ICO? Thanks everyone.