In reply to herman0055:
Regarding Arbroath - you'll be lucky if the "climbing community" there exceeds 10 people. During dry weather the local sea cliffs and Kirrie are where many of your customers are likely to go climbing, instead of climbing indoors at a wall.
In Scotland, for any wall to have a chance of being financially viable (for that is the point of a privately owned wall isn't it?) it probably has to have a significant student community living nearby.
Also, do not get too hung up on local population density figures - because, it's how many of the local population can afford the expense of visiting your wall (and subsequently choose to spend their hard-earned money at your wall) that really matters!! ... remember, there are plenty of towns in Scotland with lots of skint folk living in them.
Cheers
Ian