You may recall that I promised you a map.
Here is one, taken from one of my many route planners. The starting point, Balvicar (near the bottom). Then north to Fort William and along the Caledonian Canal. Continue North along the East coast of Scotland, turning West (either through the Pentland Firth or continuing north of the Shetlands). Bump along the top to Cape Wrath, before turning South. Then, (depending of the weather) between the Isle of Skye and the mainland or down the Minch, then dash across the the Sound of Mull back to Balvicar.
All I've to do now is negotiate the "time off" with the owners agent....