OS X 10.9 - Home Directory for Share Only Account?
Sharing Only accounts do not have home folders. Home folders are really only used during a local login session, and Sharing Only users cannot log in locally, there's no real point to having one.

If you want a Sharing Only account to have a their own private file storage location, create a folder (where doesn't really matter), use System Preferences -> Sharing pane -> File Sharing service to add it to the shared folder list, then set the owner to the Sharing account (and optionally limit access for other users).