Are you sure, you are paying 15$ per hour for Facebook ads? I think you have to think about it. I am doing my Facebook ads regularly for my different pages, and it proves, the less text on the ad image, the less it costs you. This is my suggestion, you have to cut costs when hiring a freelancer. I am a freelancer, and a professional ad expert. I haven't seen anyone charging 15$ or more for Facebook Ads. =) Just to stay safe, please double check the market price.
And, where my experience tell me, I am having a revenue from my Facebook page around 10 times higher I invested. I am using behavior targeting very specifically, also, a buyer research is much needed. An ideal customer, who has likes on different pages, can be researched from his/her profile. If you have knowledge on custom targeting with Facebook ads, then you would see, how we an target different customers based on their likes on "Jewelry", "Clothes" or "Video Games" different customer bases you know.
Also, post customer service is necessary. No matter what, if you are doing "Page-likes" "Post Engagement" or "Message", you have to convert the customer from very beginning.
Let me know, if I can help you.
Regards,
Arafat.