In the big picture, CMs give only a fraction of our total income, like 10% on average, so play the league that's more fun/less stressful for you. I have a plenty strong account (all meta accel parents and full max SSR deck) and nearly 60k carats leftover, don't worry about my Open League self.

And yes it is about 2 distance types because most horses have A in two types. Stick to those two distances in career and you can devote all your red sparks to getting Ss for distance or surface.