A lot depends on the type of home. If the logs are stacked directly on top of each other, or if there's space between them.
Haven't done it myself, but I have seen where ALL of the boxes had to be drilled, & chiseled into the logs.....
Either way it's some of the most frustrating wiring You can do.
A lot have the holes predrilled on both sides of doors, windows & corners, but if they're off just a little, it can make pulling wire pretty tough.
Not sure how you usually price new construction, but log homes are equal to a rewire in My book, & should be worth double ( at least ) new construction price.
