Well, so far I can't see Sir Walter are Elizabeth prepared to retrench one thing- apart from charites and not taking down a present to Anne.

Sir Walter's reaction to Lady Russell's regulations; "What!Every comfort of life to be knocked off! Journys, Londonservents,horses, table,-contractions and restrictions everywhere...No, he would sooner quit Kellynch-hall at once, than remain in it on such disgraceful terms." (Ch.2)

Economy and moderation do not appear priorites of Sir Walter. Anne wanted a smaller house in their neighorhood; as well as unhappy memories she may be thinking of unnecssary expenses living in Bath may incur.
'Sir Walter and Elizabeth were induced to believe that they should lose neither consequence nor enjoyment by settling there'.
Even when they must recognize Sir Walter's predicament they don't appear able to adapt well to their straightened circumstances, do they ?