If this sort of thing interests you but you can't afford a multi-million dollar build I'd recommend checking out Theron Humphrey's work building a modern lakeside home in Montana (https://www.thiswildidea.com/casa). He built a simple, modern and affordable (think low 6 figure) home and did a good amount of the work himself while sharing info on the process. Apparently he's embarking on a new build this year in Arizona and sharing more in-depth info on his youtube.