I own / operate physical therapy clinics in the Denver Metro area and have been effectively generating leads and generating new patients online for the last 3 years. And the cost of acquisition is surprisingly low (from as little as $0 if you do some of the things in-house to less than $100 for the cost of acquisition).

Though I can't say what your results might be - I have had no success with Facebook (ads or landing page) regarding new client acquisition.

If you are interested to learn what works for my business, give me a call to discuss.