YOU SAID:

if i were rich i would run into a pile of once hot coals but only if they were never not again.

INTO JAPANESE

私が金持ちだったら、一度は熱い石炭の山に遭遇しますが、二度と熱い石炭がない場合に限られます。

BACK INTO ENGLISH

If I were rich, I would once encounter a pile of hot coal, but only if there was no hot coal again.

INTO JAPANESE

私が金持ちであれば、かつては熱い石炭の山に遭遇しましたが、再び熱い石炭がない場合に限られます。

BACK INTO ENGLISH

If I am rich, I have once encountered a pile of hot coal, but only if there is no hot coal again.

INTO JAPANESE

私が豊かであれば、かつて熱い石炭の山に遭遇したことがありますが、再び熱い石炭がない場合に限られます。

BACK INTO ENGLISH

If I am rich, I have once encountered a pile of hot coal, but only if there is no hot coal again.