To the op, I didn’t read the entire thread, but in a gentle environment most anything works. You did mention mud and rough terrain. For rough terrain I like one with power steering. I live in Louisiana where people like to tear shiit up ( google Louisiana Mudfest, I live right up the road) I’ve had several bikes and seen them all. For reliability I strongly suggest a Honda or Yamaha. I have no doubt they have been the most reliable brand around here. One with i front locker is also a plus.