My grateful thanks to those who have taken the time to reply and given me their opinions. I feel a little more comfortable knowing that this report:
http://www.cyprus-mail.com/news/main.php?id=37485&archive=1 could be deemed as scaremongering.
Although I won't be up against underworld pimps or taxi-drivers, I will be offering my idea primarily to the islands' estate agents. That's not to suggest that will be competing with them, more a case of offering a new product to complement their range of services. Not being a particularly good Greek-speaker, I think I will need to investigate the technicalities of employing a Cypriot to undertake the sales aspect, thus leaving me free to provide the actual service.
Whch part of Cyprus are you in?
Paralimni. At least, according to the article, the numbers of attacks are lower in this particular area!