Hence why a lot of people's advice when it comes to creative pursuits like comics and novels is to create for yourself first and foremost. Because making something commercially viable is a monumental task, and a gamble. Even if something looks like it can work on paper, life is unpredictable and it can turn out to be a flop.
Like all of my work comes out of my love and passion for each story. Sure, any money I can get from it is nice, but even if I never saw a cent, I love my characters! I don't mind dropping like $50 to get an awesome drawing of them. (my ipad's lockscreen and background for example are images that I commissioned from an artist 2 separate times. I just love their style and how they depicted my characters.)