Question - does it make sense to create handmade runestones?

I saw you asked about financial part so... I will give some examples outside of that field totally, but just helping tips for digital freelancers I've learned through the years and I give whenever I'm asked.
As any "craft" job that you do with your hands to calculate the price is tricky and you need to consider a few things:

• How much time did it take you? How much do you value your time (realistically, e.g. web development for freelancers could start from beginner guy 10$ per hour, senior guy 70$) - In the cost of the senior guy comes the efficiency and the amount of time it took him to be that quick and good with it. In that hour do you take some breaks? If you took an 8 hour day but took few breaks, lunch and etc then you might add some extra time from you.
• Then you have some cost of tools. E.g. "render machine" 50$ per day. Some software license cost of software applications are like 2 000$-10 000$ per year - you end up charging some fee for that too.
• Now the hard part is, how valuable is what you are doing - this gets more tricky as while you are learning a trade you are also gaining experience from it. Let's say that your first pieces are more valuable for you to learn the workflow, gain experience and then they can be used as 'portfolio'. The second and third time you make the same piece you will do it in a fraction of the time it took you initially. It will be more expensive if someone wants you to create a specific 'design of a piece' that you have to research, figure out how to make, and etc.
• another segment is how many other craftsmen carving stones are there? If some guy is already established you will need to price yourself cheaper, if not much cheaper in order to get your first enquiries. Some people do some work for free initially get some coverage. I guess it also depends whether you want to do this as a hobby, side gig or a fulltime craftsman.

Hope this was not totally useless, coming from another point of view.