I am going to make a bench for a lathe in my garage.

It would be easiest and sturdiest to attach some 2x4s to the garage framing;
won't move around for anything that way. I could even run braces to the
framing also, and have no legs to get in the way of cleaning up. The
downside is that it can't be moved.
I can't see any reason I would ever want to move a lathe. What do you
think?