Marketing??!!!!!!!!!? .....?

[Aidan]

Depends on a lot of different factors, such as your billboard geographic location (a billboard in Central London will cost more than one in a town suburb), how long you want to run a campaign for, who your target audience are, what stations you wish to run TV ads on, and what time slots and how often.

Permission from the Government wouldn't be an issue if you're UK-based (if you're not, then you'd need to check)

For any sort of marketing campaign like this, if you're not sure then it may be an idea to have an initial discussion with a marketing / advertising agency who handle these types of campaigns

Hope that helps - good luck with it

Aidan