One of the benefits of being a studio painter (which most of the time is what I am), is that I must carefully plan out larger pieces.  I don't always do this, but most of the time it really helps me get a grasp on what issues may arise during the painting process. I also get to try out a bunch of ideas without having to dedicate a lot of time or materials.  The nice part about it for you, is that these less polished. smaller pieces can be offered at some pretty good prices.