A Facebook business page is free to setup and use if you don't count the time spent setting it up and updating it. Facebook uses an algorithm called six degrees of separation to link family and friends, which works very will. However that is NOT the algorithm used for business pages. If you can get someone to “like” your page, that’s great. You’ve clearly shown enough value to your customer that they want to hear more about what’s going on with your business – at least in the short term.