The keyless start is a good first step. Change user preference to owner password start. You will have to use it every time to start. All bobcats use the same key, so if somebody knows that, simply locking the door is pointless. Keyless with the password will render the machine dead to anyone but you. Yes it can be still dragged on a trailer, but S250 are big enough it makes it work to do so. Also unless the criminal is a bobcat chopshop, he can not get it started without doing things. I won't go into how the system work for all world to see. Somebody wants it bad enough, nothing short of you sitting in with a .45 is going to stop them, but keyless is a good start, especially if it isn't in an easy to tow away spot.