Advice design home/barn in center Spain

Hello, I'm starting a project involving buying a piece of ground to build a "livable" barn.
Te idea is to live in it and maybe make a living, following the code, that's the reason of a "barn". It is agricultural land, so only those are allow.
40 km south of Madrid, continental climate, hot summers and cold winters, flat land with irrigating water from a close river, during summer.

Attached some pics of actual traditional barns still in use.

Mi idea is to build a big barn (just the 4 walls and the ceiling) and then start working inside, but out of sight.

Attached are two options of what I am thinking, the fisrt one is something like 3 simple barns together making just one space. The right in the pic (south) as "dirt" zone (garage, workshop, animals, storage...). The center one as an interior "patio" (garden, fountain, with part of the ceiling translucent). The left one in the pic (north) as "clean" zone (living, kitchen, bedrooms, bath).

The last sketch is the same idea but with only one ceiling angle.

Actually I am still drawing sketches just to get most solar in winter, least solar in summer, low expenses, right use of space and resources and so on.

Ideas appreciated
Thank you very much and best regards
Manu

PD: I knwo this is not very "solar passive" but didn't find the right subforum

Manuel, its a bit hard to answer because there are so many variables.
Some questions;
- Building it yourself
- build with steel kits
- build from stone etc
- build with other material
- Have you researched 'passive building design'?
- Floor material planned
- wall heights
- roof material
- Rainfall collection to use inside
- size
- time span to build structure

John C Daley wrote:Manuel, its a bit hard to answer because there are so many variables.
Some questions;
- Building it yourself
- build with steel kits
- build from stone etc
- build with other material
- Have you researched 'passive building design'?
- Floor material planned
- wall heights
- roof material
- Rainfall collection to use inside
- size
- time span to build structure

Thank you for your words.

I will hire the construction of the 4 walls and ceiling. After that, I will built the rest by myself (out of sight).
The materials are not yet chosen, but here many use cinder blocks.
My design is for getting an space out of sight (living homes are not allowed, so in the outside must seems a barn)
The max heights allowed are 6 meters total.
I'm thinking about 25x30 meters total
Time is not critical, as I live 20 minutes by car and can wait.
I don't understand the rainfall question.

Best regards
PD: Forgive my poor english

John C Daley wrote:
- Have you researched 'passive building design'?

Is there a passive building design wich can be enclosed in an "external barn look"? ¿?