TonusOH - I think WTC is doing everything they can to make KHs a reliable revenue stream - but it is still not enough. More are fading and the only "new" ones coming in are born-ins. Eventually they leave also. The outlook for the Org is grim.
Then there is the occasional large settlement that must be dished out in cash. These seem to drive some of the targeted sales where the per/pub monthly expectation is raised beyond the reach of the cong. It is no coincidence that these KHs are worth more than the average. It should be a warning to any JW attending a KH that has a high net value. Eventually WTC may decide it is better to sell your KH, especially if contributions are falling below the limit.
For the foreseeable future, most KHs will continue to be monthly revenue stream, but some will be sold when the need arises. WTC surely has a calculation for determining whether or not an immediate sale outweighs the monthly rent paid by the congregation.
There are surely other considerations but Treasury NEVER shares any meaningful information with the rank n' file. They are the most insular dept in Bethel, never hitting the radar of anyone searching for information. If that dam ever breaks, it will be catastrophic, that's why Treasury Bethelites don't have to worry about being kicked to the curb. Even the smallest brain among them knows too much to risk having them spill the beans.
The new Assets Management group will reduce the mission critical status of Treasury, at least where real estate is concerned. This group will keep tabs on every statistic for every congregation and kingdom hall.