How much could I sell my art for?

The problem is that the older you are, the less likely you are to want vulgar words on your walls, and the people with money to by original art tend to be older adults.
You obviously have a great sense of irony - the juxtaposition of the traditional (needlepoint and all the outmoded, sexist baggage that goes along with that) with contemporary vernacular is worth exploring further - but you could do so much better.