Plan the house first and only then buy the land?

I would go into stocks, it requires much less work than owning real estate and diversifies more widely. But anyway, that's not necessarily the topic ... Although ... In what form was the saving done? How is this capital currently held?

...with 2-3 horses and grooms.

Definitely not!

Ok, so for you only the 3 caretakers?

No, I find all people who are too close and too often to horses too "suspect" [emoji2]