I know this is harsh, but the market for a K1100 is in the mid $2000's. Reduce the price and maybe you can sell it to someone as a platform for their own build. Maybe you can get a premium for having done much of the prep work for their build.
As your own experience illustrates, cafe racers are art projects, not actual modes of transportation. That is, the pleasure is in the build, not the long term ownership/use of the finished product. It is rather rare that a buyer ponies up the big cash to purchase one that isn't connected somehow to an established custom bike studio or shows a very high level of workmanship, engineering and originality.
