I have been promising myself a real workbench for years. This weekend I gave up on real and built a small one out of construction lumber and a vise from the hardware store down the street.
It is not beautiful. It is heavy enough to plane on, square enough to mark out from, and tall enough that my back does not complain. That is the entire spec.
The next bench will be better. The next one always is. This one is the one I will actually use.