To add to my post before.
I hope you understand what I mean. English is not my own language ...
Probably in this thread it is about doing a craft or making art in your 'spare time', while you live on your 'permaculture homestead'. And then making more than you need for yourself and sell those products.
How do you do that? You could sell from home, or have a booth at a fair/market, or bring it to a shop/gallery that sells it for you.
Selling from home is okay. But then you need to advertise. So the money you make from selling your product needs to include advertising costs too.
Arts or crafts fairs I know in two seasons: during the Summer holiday in regions where people spend their holidays (that's the region I live in), and in November/December, aimed at christmas presents, more in towns. Mostly the fair is 1 day, sometimes 2 (a weekend). Costs: rent a booth (rent varies a lot), drive a car with your products there and then stay there all day long (while demonstrating your craft?), preferably with at least two persons.
Shops where you can bring your home-made craft products to sell those are only in large towns/cities. In other places shops selling craft products may exist, but they work with volunteers and the income is for some charity, not for the makers.
Most art galleries only exhibit the art of their choice, you can't just 'bring in' your work, they invite artists (so you need to be known as an artist). Sometimes you even need to pay them to have an exhibition of your artwork there. Okay, your art will be sold for much higher prices than at an art fair. And you only need to bring it there, and be there at the 'opening of the exhibition' (not a whole day).
I don't know about taxes in the USA, but here every little bit of income has to be administrated and you need to pay a percentage over it as tax. Your selling price of course is not the 'income', costs can be subtracted. For me my costs always were higher then what I received, so I did not have any income from selling art.