"To muse, to creep, to halt at will, to gaze ... such sweet wayfaring" William Wordsworth
I used to be bemused by this sort of venture, all around Australia. Some people build shell houses. Some people let their house and garden be over-run by gnome statues. Why do people do this? And what makes them think that other people will pay to see their own private folly? 'Tis a bemusement.
I guess they think people will pay to see their private folly because people DO pay -- nothing like being on holiday to loosen the purse strings. Some people just do things to delight others ... take those enormous Christmas light displays for example. Another thing I have found is that if you let people know you a collecting something then they multiply very quickly ... nothing better to know your friend/relative is into frogs for example. Now you never have to think again when giving them a gift, just grab the nearest froggy thing and you are done. I make a point of never letting anything I collect get to more than a half dozen items except for books ... they are my weakness :-)
.. and Royals ...