Yep. You know what they say, "you get what you pay for".
However, there are some nice budding artists here that might do some work for you for $15. But, what can you offer in return? Some of them want to develop their portfolios or get new clients, so if you had a way of broadcasting the work that you choose, so that the artist benefits from future client development?
If it was easy, you'd do it yourself, right?
People spend 50$ on a lesson that lasts an hour, and maybe you get something out of it to add to your riding growth. But the same $50 would buy you a painting or drawing of some quality here, that you could have forever.