Website Marketing

I am looking to get customers for my online video production company on my website.
I am looking for best plan in least budget but this is long term and price might be increasing of task if goes well. As we make videos, I am thinking to advertise on Youtube or social media. Please quote me according to Youtube Ads Marketing or Social media marketing (like facebook etc) that how much impressions/click/leads etc we might expect as a result. Please quote least price + optimum results as this is a startup from local to online. This is long term, and good results will be monthly basis and we can see how it goes. You can give me a range of most suitable solution options (price/result) to fit, Thank you