Sorry @Veebie86 I have only read all of your posts, so I will probably only be repeating what others have said, but just in case you are still not sure what to do, here are my thoughts:
Is the master bedroom the one where the bedroom is on the upper level? If it is, I don't think it is big enough, as neither level has enough room on its own. How do you cope in the night when you need to go to either your toddler or your babies - in fact where are your babies sleeping at the moment - or even to the loo, as you appear to have to stumble down quite a lot of steps when you are still half asleep!?
If your twins are sharing the cot at the moment, where is your toddler sleeping?
Unfortunately, from what we can see of the other room with a double bed in it, it looks quite narrow, as you don't seem to be able to fit even one bedside table in there, and really with a double bed, each side should have it's own place for at least a lamp, a mug, and a book!
So, although it is a beautiful house, and downstairs has nearly all positive aspects, at that price (and I do know that that is an expensive area) I would expect the main bedroom to have it's own ensuite - which doesn't look at all feasable with the split level room (I can't spell mezzanine!). Also without a plan, it is almost impossible to tell how rooms could maybe be changed in order to keep the three bedrooms, but to add an ensuite (the present shower room?) to one of the other bedrooms, and make that the main bedroom.
At the moment the split level room looks much more suited to a teenager, or even a tweenager, I think they would love it, and the room with the other double bed would work much better for someone who only needs a single bed - your toddler? Sadly, I am struggling to find a room for Mum and Dad, maybe a couple of hammocks in the nursery 🙈 sorry!
I do have a few points to make about downstairs if you can bear to read them? Neither of the TVs look easy to see from all of the seating. In the lounge the long seat on the sofa doesn't look like it could get a very good view of the TV, and in the garden room, only people on one side of the room can see the TV at all.
Now I appreciate that you might not be much of a TV watching family, and that most of the time it is probably only you (two?) watching the TV, so that set up could suit you perfectly. However, a family with older children, but not much of an imagination, might find the position of the TV - especially the one in the garden room - a challenge from their viewpoint.
Personally, I would also like to make the fireplace in the entrance hall look as if it was frequently used, so I would not have it filled with show logs, and in fact, except on exceptionally hot days, I would have it lit when showing viewers around. I would also try to fit in a large, single, very squashy looking armchair, close to the side of the fire, with a little occasional table for another lamp, mug and book, and I would make use of it whenever I could!
So I can understand why you feel you need to move homes, even without the need to change locations, but unfortunately many lazy or unimaginative people these days seem to need to be 'sold' a whole lifestyle, rather than just look at a property and decide for themselves how likely it is that it could be made to suit their needs and desires.
I do think that even though your property is both beautiful and unique, it is probably overpriced for what it can currently offer other families. Good luck OP, if I wasn't disabled I would love to live in your property, but it would also need to be in the South West for me. There will be other people who will fall in love with your home, but to be able to sell it quite soon now, please try to lower your price 💐