WATCHTOWER logic at its finest:
Average Joe Witness can't work on a building (church, mosque, temple etc.) owned by 'Babylon the Great' so that he can make a living, feed his family, afford to go out in service preaching the 'good news' and probably make a donation to the 'Worldwide Work'.
However, The Governing Body can sell a Kingdom Hall to 'Babylon the Great' and use the funds to further the "World Wide' work.
Makes perfect sense to me.