All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad
is His slave and Messenger.
If the nikāḥ is conducted and concluded, fulfilling all its essential elements – such as the offer and acceptance, the guardian (walī), and the witnesses – then the nikāḥ is valid, and the girl will Islamically be considered your wife. Consequently, whatever is permissible for a husband with regard to his wife will be permissible for you as well.
However, we would like to mention that there is a difference of opinion among the jurists regarding making Hajj or ʿUmrah the mahr (dowry). Some of the jurists considered it permissible, whilst others did not and deemed it invalid; according to this latter opinion, the woman would be entitled to the same dowry as other brides of the same social status like her.
Allah Knows best.