During a meeting, if the discussion rambles on after a decision has been made, let the discussion occur, because it is beneficial. ask the talkative member to be quiet. summarize what has taken place in the meeting, then redirect the discussion. change the subject.

Summarize what has taken place in the meeting, then redirect the discussion after a decision has been made.
The purpose of the summarization is to make every members in the meeting understand the conclusions and started to formulate their own planning to do their part to contribute to the team.

You don’t list any options but the one that frets overspending and the consequences of that.