That is very cool. And will allow many a build.
Then, one day far from now, when you have tired of living and kick the bucket, your heirs will have to decide what to do with the 80% that still remains!

Not picking on you, speaking from - almost - experience. Hopefully my bucket kicking is a few decades out.

Meaning I have a Very Large Supply of scratch building materials and eventually only a fraction of it is ever likely to get used.
Look forward to seeing what you come up with.