The Microdairy vat is great if you need to legally pasteurize, but if you're making cheese at home or don't need to pasteurize, there's no reason to spend $5k.
A big stainless steel pot on the stove or in the sink will work perfectly. Very little need for a temp-controlled water jacket if you're working with that much milk in a normal 70 degree kitchen - the temp just doesn't fluctuate that much.