Okay Pat, I'll bite, but I won't hang on for very long.
Honestly, it wouldn't matter to me. I would be happy to have the work and honored to work with a good client and do my best effort. I know you said prefer, but since I have never been put in such a position, I have never given it any thought. When put in a corner it would really depend on the property, and whether or not 27, or 36 holes should be placed there, or did you mean simply from a practical or financial/selfish point of view? I'll say this, the challenge and excitement of designing a 36 hole facility would be one whole lot of fun fun fun to keep me awake for many nights, hell, I'd have to set up camp on that piece of land and tell the wife to send the mail!
To me, there are too way many variables and issues, sociological, environmental, ethical, business, marketing, resort, private, public, hell, where do I stop... to be addressed before this can be answered in a thoughtful way. As you are aware, there are many many issues that should and need to be considered, but then again you may be looking at this from simplier means...? and I don't want to assume where you are going with this. Shit, you could write a white paper on the philosophical impacts and business strategies for pros and cons alone.
Thats it, I'm going back to swim...your not taking me home to the frying pan tonight.