You're right, goats can be trouble makers. We use sheep to mow our lawn and they are very easy to deal with. They won't go over a 2 foot fence and don't need a lot of maintenance. Water, occasionally some mineral rich feed, and a shear.
Sheep is what I’d like to get eventually. I LOVE that Hawaii’s giant solar farm incorporated sheep into their design, as the method of keeping the panels clear of vegetation.