Is there a perfect size when it comes to earthbag or other natural material homes?

I'm designing my own home and want to incorporate earthbag, cob, strawbale, slip straw, passive solar, living roof, with a rocket mass heater, balah blah blah- I wanna stack function in this house like a deck'O cards. Is there some kind of magical number for square footage that goldilocks ( me) can go for that will maximize efficiency of all these things? Been thinking about the edge effect and how it has an optimal size range to get the best result, and wonder since I'm creating edge with the walls of my home- can I go too small? Too big? If I build a small cabin to try out some of the methods I want to use does it need to be a certain size to see benefits? I live in eastern WV and so we see temps get below zero-50F in winter and 80 to over 100 in the summer with high humidity. The slope of the land faces east but gets good southern exposure, almost no western sun.

Form follows function.
Design to suit.
Access your needs and wants.
I like to suggest: start small, allow for additions as time, money, energy, needs grow.