The pasture that my family has had access to since my mom was a little girl is 12 acres and it’s a great resource. My bulls are hanging out there right now. I’m amazed how much steep ground the cows can access. Both species at once could be a good option. I won’t own a sheep but I have someone I may start custom grazing them for and we have some goats around.
Discussion
Our cows can definitely manage the steep ground just fine- I'm impressed! - but they do a number on it. Lots of bare muddy patches after they've been there (depending on the weather/time of year), which is much harder to regrow than flatter areas.
Great that there's a family history to your pasture!
If it is intensively grazed in between longer periods of rest, some of that traffic can be a net benefit to the soil. It’s just a management thing.