Yeah, I'd previously thought about dairy goats and decided there's just too much damn milking. Given some pasture land, I'd choose to raise sheep for meat. It's not a huge amount of income, but it's a lot less work than dairying. Plus you're keeping your own family supplied with lamb--and pork, it's easy to keep a couple hogs around--which is a big savings at the grocery store.
One of the parts that the worksheet brings in is all the expenses - both fixed and variable. This is where there is a "yes, you could have a dairy goat heard and make money, but in order to make more money, you need to better vertical integration of the operation" which gets into the growing your own fodder which gets into other economies of scale and ends up looking more like a regular dairy operation growing oats whatever.
The "have a heard of goats, milk them twice a day and live off of that with lots of free time between the milking" isn't something that is easy to do.