And the potential problem right there is that the existing shots on the website are good. They convey the impression that there is a bit of style to the place, as indeed does the site itself. As to the relative paucity of pictures, isn't less sometimes more?
Speaking as a retired pro photographer, I can assure you that taking additional pictures and preparing the files so that they blend in with what's on that site now would not be anything like as easy as many folk may think. And it
does matter that all the snaps on a site have a consistent look to them. Lack of that consistency is one of the first things that shouts "cheapo home-made job", and I doubt that's the impression the new owner wishes to create ...
ETA - it occurs to me that if it's a case of people wanting to see the premises in context before making up their mind to patronise it, there's always Street View