There is also the business in art. It could be the way of one artist selling his works in normal ways that were already laid down. You can display them in areas where people could go and they could buy your own painting or any works of arts. They could be sold in art galleries or any commercial establishments that can sell them. There are artists who became successful that they could sell their works at a higher price so they could focus on work arts.
Others have to work so they could support their passion for making artworks. They can make whatever they want and they are contented with enough payment as long as someone has been interested in their work and get them for display. The big cash comes when paintings are being sold in auction. That is because it is not just thousands of dollars but they could sell in millions and even billions. Sometimes it would seem to be unrealistic or not practical to own a very expensive painting.
It is not the painting itself and the material that was used in the work of art but the name of the maker of that work of art that makes it expensive. One artist’s work can sell for thousands of dollars and one could sell by millions of dollars even if one artist made them. You can search on the internet and you can find top works of arts that has been sold in the auction according to its price.