Yes, a thousand yeses. For having tried that (and relatively succeeded), I know the benefits of having personally developed a language and made it (relatively)

Yes, a thousand yeses. For having tried that (and relatively succeeded), I know the benefits of having personally developed a language and made it (relatively) popular. It's an amazing thing to have on your CV, a great experience if you've got lots of free time and/or are very productive, but I really wouldn't base a business on it. It might be affordable as an investment if it's a very small part of an existing company based on another business, but that's about it.