Can the one who is observing i’tikaaf give lessons and halaqahs?

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Should he observe i’tikaaf during the last ten days of Ramadaan by himself and not go back to his family and worship with them?
The guidance of the Prophet (peace and blessings of Allaah be upon him) regarding i’tikaaf

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He wants to observe i’tikaaf on the odd-numbered nights only
He has three wives and his family need him to be present among them, but he is intending to observe i‘tikaaf for the entire month of Ramadan!
He does not pray in the Prophet’s Mosque so that he can pray behind an imam who he thinks helps him to have better khushoo‘ (focus) in his prayer
Should he observe i’tikaaf during the last ten days of Ramadaan by himself and not go back to his family and worship with them?
The guidance of the Prophet (peace and blessings of Allaah be upon him) regarding i’tikaaf

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