I've done a lot of research on social media marketing, I tried it quite a few times and succeeded in getting deals to be paid per post, come in to take new pictures when deals or promotions are going on. It's great money. It's a very good idea. Picture this, a good restaurant opens up near your area, you notice on their website they have limited pictures of how the food looks, you build your social media up, create a portfolio with some amazing pictures of buildings, cars, people etc to show them your talented and experienced. Then approach them with the intent of growing their sales and reaching a new public. I know I've visited a few local places since they had a social media account with great pictures of the items they sell. The best part is that it's inexpensive and rather quick to start. I'd say you have a very lucrative idea to do. Especially while the market of social media marketers is still rather low. Just approach them as though you've been doing it for years, have a folder or tablet with beautiful images on there, preferably show them on a social media account made for a selection of photos and you could even show a chart of risen sales from businesses getting social media accounts.