They rented a building in Makkah to stay there in the daytime during the days of Mina

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Check below answers in case you are looking for other related questions:
If his family offer an udhiyah on his behalf whilst he is on Hajj, does he have to offer another udhiyah?
If the pilgrim who is doing tamattu‘ does not fast the three days until he leaves Makkah

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Related Answers:
Should he pray istikhaarah before performing Hajj?
He is doing Hajj on behalf of someone else – will he attain the virtues of Hajj?
He intended to do tamattu’ but after ‘Umrah he fell sick and went back home, and did not do Hajj
If his family offer an udhiyah on his behalf whilst he is on Hajj, does he have to offer another udhiyah?
If the pilgrim who is doing tamattu‘ does not fast the three days until he leaves Makkah

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