@Kennetht76, Believe it or not, it's really not that hard to install. Maybe your thinking that's easer said then done.
If you can take some pictures of your current controller wiring all you need to do after that is unhook those wires from your controller, remove your old controller box, install the Rachio controller and use the picture/s you took of the wiring and transfer those wires to the Rachio controller connecting each zone as was on your old controller. After that you can plug in your Rachio. Download the app to your mobile device, configure your zones, and setup a watering schedule.
That's my suggestion, save the money you would pay a contractor and do it yourself.