If the Watchtower told all the congregations that there will only be one meeting a week and that it will be at your local Assembly Hall, combined with other congregations (super congregations). Then the Watchtower sold all the Kingdom Halls. Every meeting the Accounts Overseer would say that they are in the red $15.00 X total number of publishers scheduled to attend. Literally having to raise on the average of $9,000.00 per meeting or about $500,000.00 per super congregation annually.
For many Witnesses this new arrangement would mean an hour or more commute one way per week per meeting and an expected donation of no less than $60.00 a family per meeting or $240.00 a month. All for a 2 hour weekly meeting. Field service meetings would be held after the meeting to plan the entire week's field service activity (i.e. "cart witnessing").
This business model...er, spiritual arrangement would bring in millions of dollars a year. This does not include the billions raised in the sales of Kingdom Halls, which, according to new light, are not longer required. After all, Moses to call the nation of Israel into small groups. Moses called big national conventions. Jesus preached to groups of thousands. It would only befitting of Jehovah's modern day organization to do the same.