My neighbor has a big lawn business and owns probably 10 eXmarks. She put 11,000 hours on one with no major breaksowns.
I mow about 2 acres and bought a Cub Cadet they called "the tank". Had lots of trouble out of it and some major problems at just over 400 hours. I traded it in on an eXmark and love that machine. The ride alone was worth the trade.
Do not buy anything with a stamped deck because it is not the real deal. Also do not buy anything that does not have some service in your area. Expecially if you live around sweet gum trees. The sweet gum balls will manage to knock the belt off of any mower.
My family own 2 lawn service with over 800 customers and i worked on exmark for 5 years in houston i have never seen one with 11000 hrs and mainly because the hr meter only goes to 9999 so 11000 would be impossible to judge. But kubota zero turns are some of the most expensive but they are by far the toughest i have seen