1)
What will dwell in his tent without him?
1.
Rashi: His widow, for he died.
2.
Ibn Ezra: A foreign Chayah.
3.
Devar Eliyahu #1: Matters that he did not think about will dwell in his grave.
4.
Devar Eliyahu #2: This world is only like a tent. All his toil to build buildings and tents, strangers will live there, that he had no connection to them.
5.
Malbim: His Nefesh will dwell in his Ohel (rotting body), to feel its pain.
2)
Will sulfur be spread on his tent?
1.
Divrei Eliyahu: It will be spread on his grave.
2.
Malbim: It will be spread on his body, to burn it with the fire of Gehinom.
