As the title suggests, I am looking for recommendations on a used snowmobile that would be ideal for pulling my grandkids in our field (10ish acres). I think I prefer air cooled 2 stroke, though I can be convinced to go 4 stroke, I just don't want it to be too heavy to get unstuck. Electric start is a must. Reliability is worth paying a little more for. Are there specific years and models anyone out there can recommend? I'm at 6,500ft and might consider taking it on groomed trails near my home though it's primary use will be from the garage to the field with occasional use.