NOTE: The attached map is very large (>40 MB) and it looks like the forum software can't handle it. So I've also made the map available via Dropbox:
The attached map of the Cottages has been “georeferenced” to 5 points on the marina.
I’ve added a circle of 50 m radius to the bottom right corner so scaling/distances can be verified.
If anyone thinks the scale is off or if it’s not quite what you want, I can redo the georeferencing and scaling.