I am considering buying an ATC. I would like to know from experience how is the longevity on these? What major issues if any do they have. Basically I am looking for a cheap (under $1000), that would give me many years of trouble free use. I'm torn between buying a yamaha big bear or 2 ATCs. Please give me some suggestions on what I should do. It would be my first ATV ownership. I also would like to know how many miles can be put onto ATV motors befor they need to be rebuilt and does it matter how old a motor is compared to a newer big bear?