If you're only optimising for cost, sure. If you're also optimising for effort, yeast is a no-brainer. The machine is useful if you're not good at/willing to/a

If you're only optimising for cost, sure. If you're also optimising for effort, yeast is a no-brainer. The machine is useful if you're not good at/willing to/able to plan a bit. You have to do a number of steps on a schedule when baking by hand, there's only one to worry about with a machine.