I have a CK30 that I use for clearing my driveway, moving loads with the bucket & pallet forks, digging/grubbing with the bucket w/toothbar, some light brush hog work, dragging logs & processing firewood and assorted other tasks. It has been an excellent, hard working machine for me. The power of the beast never fails to amaze me. Only two issues in over three years, a headlight relay malfunctioned leaving the headlights on and a bad injector pump rack, both replaced under warranty. IMHO Kioti's reliability is very good. If you shop for reliability statistics on internet forums you will be turned off from any brand of tractor.........or any other product for that matter. Forums such as this (and I'm a member of four or five different ones for different obsessions) tend to inflate the problems. More people tend to post problems looking for help or the "rants" tend to on a life of their own in my experience. Less people post when they are out actually enjoying the "toys", or they're just too busy.
My .02, the CK30 is an excellent value for ground engaging work (digging, snow removal, landscape work, material handling, etc..) but doesn't strike me as a good finish mower. Seems like it would be a bit heavy and cumbersome for that kind of work. If I were you the first thing I'd do is prioritize your tasks and go tractor shopping from there. If finish mowing is the highest priority, I'd look at something lighter that carries a belly mower. If tough ground engaging work is at the top of the list, go heavier, tougher built the better and higher specs.
Good luck with your "toy" shopping and thank you for your service.