Facebook Ads will give you the initial traction.. Getting 1000 likes would not be that difficult if you use fb ads wisely. After getting the initial fans, all you need to do is to influence them so as to make them share your content with others, resulting in more likes.
Also, what you post on fb matters a lot. It doesn't take long for people to 'unlike' a page.
Just read this good article on using fb ads for getting 'likes', hope you find it good:
How We Got To 40,310 Facebook Fans In 4 Days