Bill, I think many of us wonder what will become of our tools when we die. I have a son who will inherit all my tools and things, and I have many interests beyond machining. I'm pretty sure he will value them as much as I do, if not more, because of their connection to me. I am one of the lucky ones to have such a son.
It sounds like you, too, are very lucky to have a daughter that will carry on your legacy. Whatever you end up building, I'm sure she will treasure it as a way to stay connected to you. It's hard to put a price on something like that. You're embarking on something that carries your tools, your soul and your heart - not going to find something like that in a store, that's for sure.
My very best to you, Bill. I hope you end up with what you're wishing for.