Most points are already covered by other commenters, esp the one about not doing market research first. Anyway I just wanted to add one more thing from my own

Most points are already covered by other commenters, esp the one about not doing market research first. Anyway I just wanted to add one more thing from my own experience. Don't build and sell technical products that you aren't willing to commit to for a long time. What happens is you will probably find 5 customers who will invest their time in money understanding your highly technical project but as you don't get orders (or if you have clinical adhd like me) you'll want to move on to a new shiny object while those 5 people are left holding the bag. It's not fair to the people who trusted you and migrated their infrastructure to get the benefits you're offering only to later realise that the project is dead and no updates or bug fixes are coming. Just something to think about.