Agree make sure to measure your goats to be sure they would fit. If you end up with the wood one you can always use a 2x4 with a piece of 2x4 on each side between the existing wood and add on 2x4 to stick out for hanging a feed pan on it too.
I have a wood milking stand, and it works really well. But if I had to do it over again, I would get one with a metal mesh bottom (like the one in second picture). The manure and dirt would fall through instead of building up on the platform. Far less cleaning and scrubbing to do!