That's awesome.

That said, didn't you just shift the cost instead of reducing the cost?

It's of course subjective, and the goal of the question isn't to devalue your work, au contraire, I'm saying that you contributed 120k worth of value.

This is as-is a product that you can sell to other bowling alleys, and do not fall into the trick of selling savings and pricing it at like 20k. Your product may be better as it can be customized, modernized, it has a single author and less bureocracy than a corporate 30yo bundle that was handed over through 5 generations of programmers after resignations and layoffs.

Good luck