I agree with Rich on every aspect. Rule design is the easy part. Completing all of the other steps is very time-consuming but necessary. Since Covid, my local publishing company that I used closed down, making it an unfeasible endeavour to continue getting rule sets printed. Also, the cost of postage, at least in Canada to ship world-wide, has made it pretty much impossible to sell as it adds nearly another 50% of the cost of the rules to the total.