Looks good, Elisabeth.
It's a long time since my two daughters were that age, but as far as I remember, they were happy to be below in bad weather, and roaming around the deck in good weather, when we borrowed a boat of that size. More recently, when I crossed the Pacific in 2009, in company with a lot of other boats on the Coconut Milk Run, it was clear that those boats with pre-teenagers aboard were content to have them swinging from the rigging, running about in dinghies, etc, much as you'd expect.
I don't see this cockpit as a problem. It's a good size for two watchkeepers, and when they've got used to being aboard and on passage, most pre-teenagers will be below with their earbuds in for much of the time, listening to the latest heart-throb, but ought to able to stand their watch when asked to do so. JR means that you spend much more time below, warm and dry, than is the case with other rigs. The deck looks well protected, so in good weather, with jackstays rigged and harnesses on, I doubt whether they'll want to be in the cockpit. With a watch system of one parent + one child on watch and having first dibs on the cockpit, the others either below or on deck, four hours on, four off, it'll work out, I think.
PS I see that the boat's in Mediterranean Spain and you're in Skye - would the first thing be, if you buy, to sail home or have her shipped home?
I'm planning to sail up that way next summer, and would be interested to have a look if she's there.