This is off the subject of tools, but when I'm doing a project at home - let's say plumbing - I'll buy everything I might possibly need from my local Home Depot. Then when I finish the project, I'll take back those things I didn't use. HD has no objection to that - I suppose because some people don't return the leftover stuff - and it sure beats having to stop and drive there again to get a few more parts.
Mike
[Even with that, almost every project is a two or three trip event. I just run into stuff that I didn't expect.]
Go into the world and do well. But more importantly, go into the world and do good.