Using haraam earnings for hajj, getting married or building a masjid

If a person had amassed immense wealth made up of trading in haraam, and then repented to Allaah [from that], is it then permissible for him to perform hajj using this wealth, or donate to charity from it, or [even] get married or build a masjid using it?

Ridding yourself of haraam wealth

I acquired some money from haraam means, and I have since repented sincerely to Allaah. After having repented, I feared [my] wealth may be a source of loss for me, as I had also gotten married using this money. I now wish to use this money and perform ‘umrah and hajj with it, so what is the opinion of the shaykh regarding that?

Promised to marry her if she embraced Islaam

I am the undersigned ‘Abdul-Qaadir, and I am 25 years of age. I wish to ask regarding a Christian woman who is 25 years of age; I promised her that when she becomes a Muslim I will marry her, and now she has embraced Islaam should I marry her, keeping in mind that my father is strongly against this marriage [taking place]?