Consider too, adding a hidden locating system so when it is stolen you can hopefully track where it is and recover it quickly.
The Syder has a pretty involved security system to prevent starting the machine, so essentially it will be slid onto a flat bed, then torn apart and sold as parts.
As for chains, cables and such securing it to poles or embedded concrete, they are merely a deterrent and a battery powered cutout wheel will be through them in under a minute.
Essentially, if crooks want it, they will get it. As they say, gone in 60 seconds...