@Irena64 I just had a look at your listing- it's charming.
The folks that did that stuff to my house weren't guests- they were long-term renters with rental contracts. But I also property manage a couple small places for friends, so I've seen all manner of messes and damage. One girl at one of the properties left her dog in the house "by accident"- it ripped the curtains to shreds in its panic to get out.
One suggestion- I would change your wording a bit. "Complete privacy" sounds like it would be a good thing to say, but in a lot of guest's minds, it says "We can do whatever we want, no one's watching". Where you talk about interaction with guests, make it clear that you live on the property, so are always available to assist them with whatever they might need (I like the part about sitting around a fire with your guests). Try not to make it sound like you'll be out of sight unless they ask you for something. I'd play up the eco-friendly, organic garden parts and downplay the luxury, pool, perfect party house pitch (I know you don't say perfect party house, but that's what it could conjure up in a lot of guests' minds). Of course the pool is a great amenity, you do want to feature that, but obviously you're attracting the wrong type of guests.
I have a much more modest offering than you, but feel free to take a look at my listing wording- so far it's attracted exactly the kind of guests I like. You might get some ideas. I think marketing towards the type of guests you want, rather than just marketing the property, is key. In other words, you are telling certain types of guests that the place will be be perfect for them, rather than them deciding that the place is perfect for themselves.
And with guest that stay more than a few nights, I'd find a way to get in there to check out the scene, whether it's letting guests know that you come in to vacuum every 4 days, or change out towels, or something that sounds reasonable. That way not only are they less likely to trash it out, but you'll be able to deal with bad guests hopefully before they can do too much irreparable damage.