Glad that you can make it work. It sounds like you're very reasonable about the costs and sacrifices involved. It's not just "invest consulting money in product development", rather it's "invest and save every dollar possible."
Again, it's good to see that it works for you, and that you haven't had to sacrifice your family for it. Perhaps the supporting family is one reason why you're able to pull it off. (Kids care more about your time more than money anyway)
I will try to think about the things that could be replicated and share that in an article later on; yes I think it requires a fairly accurate financial navigation, and focus on family for sure.
Any insights are appreciated. It seems like people look at the outcome first (steady passive income) which is a good strategy, but hard to do if consulting is the first master. At larger places that I worked, either the skills were missing for the SaaS switch, or there wasn't a stomach for the investment involved.
Again, it's good to see that it works for you, and that you haven't had to sacrifice your family for it. Perhaps the supporting family is one reason why you're able to pull it off. (Kids care more about your time more than money anyway)