I would suggest you start checking the pressure every single day before the equipment is used, and make sure it matches the manufacturer's recommended PSI for the load. Also, check for uneven wear patterns, as that can point to alignment problems or issues with how the operators are driving.
For sure! I'd add that rotating the tires periodically and keeping an eye out for embedded debris can save a lot of headaches and a few bucks-over time.
Good points all around. I would also look at how the machines are being used day to day, like excessive spinning or sharp turns can chew through tires fast. Sometimes a quick operator refresher makes a bigger difference than switching tire types.