。
My mother is well off.
Literal
Mother [topic-は] livelihood [subject-が] good
暮らし向きがいい = 'livelihood circumstances are good' = 'is well off financially.' 暮らし向き is an idiomatic compound: 暮らし (living) + 向き (direction/tendency). が marks 暮らし向き as the subject of いい within the topic-comment structure.