Is it permissible to accept a marriage proposal from a committed young man whose father works in a hotel that serves alcoholic beverages and contributes financially to the wedding expenses? Is the father's money illicit (haram) or mixed? And will I incur sin or will the blessing of the money be lost if I accept marriage with these funds?

If the suitor is a person of good religious commitment and character, then accept him. His father's work in a hotel does not harm him. The father's work in human resources in a hotel that serves alcoholic beverages is not unlawful, as long as he is not involved in serving or selling them. Money earned unlawfully does not make dealing with its earner unlawful, according to some scholars, because the unlawfulness is attached to the earner's responsibility, not to the money itself. The Prophet, peace and blessings be upon him, used to deal with the Jews despite their consumption of unlawful earnings (suḥt) and taking of usury, which indicates that money earned unlawfully does not become unlawful for anyone other than the earner.