Here is my 2 cents as a relative newbie with @5 years under my belt. I am out of the "buy everything at home depot" phase.
@milehigh_7 , your heart is in the right place and I agree with you in so far as its all about the material and that the odds of finding material at HD, Lowes, Walmart or any regular landscape nursery that will ever make a decent tree of any sort is extremely low. I have found a couple that I think will make a decent tree someday, but it will take time. I also have a few trees that were grown for bonsai that will also make decent trees some day and in probably less time. I'll try to post pics of both categories later (at work now and cant).
That said, I don't agree that a person just getting into bonsai with no knowledge whatsoever about keeping anything alive should go out and buy a $200+ prebonsai.
The cheap HD material is excellent for learning how to keep stuff alive, how to water (do we ever get this one right?), how to repot, how to prune, how to wire and how things respond to repotting, pruning, trimming, wiring. Killing a $40 HD us a lot less painful than killing a $400 tree.
I do feel you can learn a lot more
initially from those 10 $40 trees than you can from one $400 that you are too afraid to touch because all you see is $400. The key is gaining confidence to tackle the better trees and you can't do that if you're afraid to touch the tree.
At some point, though you are absolutely correct, you have to move on to better material if you want better trees.
I got over the buy everything at HD almost 2 years ago. I bought lots of different cheap things. I've done a ton of repotting and basic pruning. I experimented with soil and got over that lesson in about 3 years. I killed a bunch of trees but I also got a bunch to live. I know what works for me and what I can grow.
Did I set myself back 2-3 years by working on cheap material during that time? I don't think so. I learned a lot and I gained the confidence to try more expensive material. I now have 6 trees that were grown for bonsai and I'm learning development and refinement with them.
We all go down similar routes when starting this crazy hobby, it's the nature of the beast. Unless you have tons of money to throw around to buy expensive trees and take private lessons, learning the hard way is how it goes.
Alain will figure it out in the next year or two and realize the difference between his HD trees and good material, or he wont. As long as he feels he is progressing and is happy, who cares.