It looks like you are planning the next 20 years for of reptile keeping. Why not just plan what to do next, and let the future be your future. It's great to daydream, but don't get lost pretending your day dream is your life's plan...
My only suggestion is don't get in over your head before you are ready...
Try to breed black marsh turtles, they are a very interesting challenge. What about for example some blue tongue skink species? Or cone head lizards? Just giving random thoughs about some cool reps I like