I have cursorily looked at goats.
Only ate it once and I would have to acquire a taste. And I've heard keeping them in can be a challenge.
There was a lady on Coast2coastam a short while back on prepping and she was big on rabbits.
backyardfoodproduction.com
Her thing was fast reproduction, small area and easy to feed. And pellets for good fertilizer.
We had a few rabbits when I was a kid for a short while
I will be investigating the seep. One spot probably wasn't runoff, others may be
Check around you for feed companies. Not feed stores people that actually produce animal feeds. We found one in driving distance and bought the stuff in half ton lots and it drove the cost of keeping the animals way down.
We built a small shed frame and used wire fencing for the walls and to protect the investment.they all had cages and the females we added nesting boxesPop had 8 females and two studs and that was enough for himself and the rest of the family.
We made heaters for the nesting boxes using painters lights screwed to the bottoms and fifty watt bulbs so if there were winter litters we turned on the heat for the little meals to be.The droppings all went into the garden.The studs got loaned out or swapped out so the bloodline was kept up. The oddly bigger babies were kept as future studs for friends and the females for breedind. 90 they weighed in at over 7 pounds and that rang the dinner bell.