YOU SAID:

I wish my older brother would move back in with me.

INTO JAPANESE

兄が私と一緒に住んでくれるといいのですが。

BACK INTO ENGLISH

I wish my brother would live with me.

INTO JAPANESE

弟が私と一緒に住んでくれたらいいのに。

BACK INTO ENGLISH

I wish my brother would live with me.