SgtPilko
Mame
Yeah just use whatever you can manage and dont let it hold you back. If you trawl this site you will find various threads on the merits of ground growing, pond baskets, self-built wooden boxes, gradually up-potting in standard nursery pots etc... Just avoid restrictive bonsai pots until the latter stages of development.I never even thought of checking somewhere like wilkos for them. Ive heard that maples do grow fast though and to be careful leaving wire on for long times.
I don't have any ground I can plant in really, would a very large pot work or would having to prune roots every few years or so keep it from growing thick? Even though the pot would be big, it would still get pot bound I suppose.
That's what I'd like to do though, get trees at different stages of life so I've got plenty to go at and learn.
If you are already in the gardening trade thats a big plus! You might find some other interesting species people want cleared out off their land, or cheap material from your suppliers.