It is wireless, transmitter goes on the top of the mast ( just three screws) and display gets connected to GPS and autopilot. It is my first season on my own boat, I am learning.
Thanks Natalie, so it sounds like the yard has quoted you a day's worth of work (7hrs). Hard to know with any certainty how accurate this estimate is. On the surface, I don't think it's unreasonable.
It takes a few minutes to screw in three screws, but getting to the top of the mast, and perhaps creating a platform for the transmitter may take a lot longer. Again, it's hard to say without seeing your setup.
The GPS will have to be wired in via a hull transmitter, which must also be mounted somewhere. This job could take as little as 30 minutes, or it could take hours, depending on the wire runs. Same goes for the autopilot link (I assume you're linking your GPS and wind data to your auto). Then there's testing and cleanup... Won't be hard to run up seven hours.
Everything on a boat takes three-X as much time, effort and money. You'll get used to it
BTW, the single best way to keep costs down is to do as much yourself. This job doesn't require a lot of specialized skill, but it does take time. Labour is costly (as it should be), but you don't have to pay anyone for your work.