I’m into year 5 with bonsai and I no longer buy nursery stock that does not already have a trunk size that I want for my finished tree. I have plenty of those from years 1 & 2, lol!
I consider myself reasonably patient, but I’m in my sixties and have found that it is a lot more fun to buy something that I can start working on right away. I’ve been buying yamadori that have been recovered and established in pots for the same reason. I can either repot or start shaping and wiring right away depending on the season.