I have my doubts. It's a really pretty place and it looks well kept, clean and safe. Putting the horses out in a large herd setting though can give you certain issues, such as having the horse be hard to catch and injuries from fighting or playing rough. The feed situation wouldn't work for at least two of my horses as one has no teeth and is prone to colic while the other would drop weight quickly without the extra source of protein. My other three would probably be ok. I have two that must have their hooves done regularly because of certain issues.
I don't like the stalls because they can play fight over them or crib if they are bored, etc.
Looks like the trainer is a parelli type person which is fine as long as you "don't drink the kool-aide" and keep your eyes wide open.
I don't see MAJOR issues with the place and it is really pretty. I think it's a matter of what will work for you and your horse.
Good luck in your decision!