Judging by the number of requests on various forums for sites that take bring-ons, and the lack of reports from those who have sucessfully moved, I suspect that simply finding a site to relocate to without adding the age limit situation is not easy.
Very few sites will allow relocation of even a nearly new static, and those that have no age limit are even fewer. I have yet to read of anyone who has successfully relocated a static, despite this question being asked on here numerous times.
As I understand it, this is something that is far easier achieved in mainland Europe than it is in Britain. In this country the site owners have the market well sown up between themselves, as most of their money comes from selling and siting new statics.