Natural horse-barning

It's so easy to barn a horse with some important thing to do:

• hay ad libitum (endless :-) )because horses have to eat a long time per day for a healthy digestion.
  
• enough place to move. Wild Horse move up to 20 Kilometers a day.Our horses should get at least a fraction of it.
  
  
• a place to shelter.
  
  -fresh water
• and a Herd in which they can live in. Horses are very social animals they need contact to each other.
  What do you think? How do your horses live like?