I know at some point I'll want better material, but I have plenty of time to hone my skills and save my money for a piece of material that will truly be a work of art, I know the material is sub-optimal but I'm 21 almost 22 and I plan on doing bonsai until I drop dead, I have plenty of time to hone my craft and work towards trees that may someday be revered... I'm not wealthy by any means and I'm doing my best to get by and improve in very poor conditions as Utah truly isn't a great growing environment with high alkali soil, clay, and extreme weather (at my house we regularly get hurricane force winds funneled through the canyon.) Spring remains freezing and we can't get any massive pushes of growth here...
I know it's not perfect but I'm learning the foundations of our practice and these trees if they survive will go on to be used to practice other risky practices later if they thrive. Could I go and purchase one of the best pieces of material in the nursery? Absolutely however it will set me back 500 dollars for the plant alone, not including proper soil, fertilizer, pesticide/fungicide.
I know to become a master there's a significant financial hurdle to jump. . . I'm not there yet and rather use that money to stabilize my life so I can purchase the materials I crave in the future...
So for now, I'll work with trees that have a few flaws, maybe learn to work with flaws to accent the natural beauty of the materials... And in the future I will be better because of it.