He bought a house with a riba-based loan; should she accept him as a husband?
Question

                I am a religiously-committed nineteen year old woman. A religiously-committed young man of good character has proposed marriage to me, but I refused because I know that he bought a house by means of a riba-based loan. He comes from a well-off family and he consulted a number of scholars who agreed to this loan. Should I agree to marry him, as he is persisting in proposing marriage to me? Will I committing sin if I marry him?.
Praise be to Allah.
    Firstly: 

    The fact that you hate riba and refuse to marry someone who 
    deals in it is something for which you deserve to be praised and 
    appreciated. We ask Allaah to increase you in faith, knowledge and piety. 

    Secondly: 

    Taking out riba-based loans is emphatically forbidden, 
    because of the stern warning that has been issued concerning riba, as Allaah 
    says (interpretation of the meaning): 

    “O you who believe! Be afraid of Allaah and give up what 
    remains (due to you) from Ribaa (from now onward) if you are (really) 
    believers.

    279. And if you do not do it, then take a notice of war 
    from Allaah and His Messenger but if you repent, you shall have your capital 
    sums. Deal not unjustly (by asking more than your capital sums), and you 
    shall not be dealt with unjustly (by receiving less than your capital sums)”

    [al-Baqarah 2:278-279]

    Muslim narrated (1598) that Jaabir (may Allaah be pleased 
    with him) said: The Messenger of Allaah  (peace and blessings of Allaah 
    be upon him) cursed the one who consumes riba and the one who pays it, the 
    one who writes it down and the two who witness it, and he said: they are all 
    the same. 

    This kind of borrowing is haraam, even if it is to buy a 
    house. See the answer to question no. 21914 and 
    22905. 

    Secondly: 

    If this young man is acceptable in terms of religious 
    commitment and character, then pray istikhaarah, asking Allaah for guidance, 
    and accept his proposal of marriage. There is no sin on you for that, for no 
    soul is made to bear the burden (of sin) of another. As for him, he has to 
    repent to Allaah and resolve not to do that again in the future. We hope 
    that Allaah will forgive him, because he did that on the basis of the 
    opinion of a number of scholars, as you said, but the correct view is what 
    we have mentioned. Buying a house is not one of the necessities that makes 
    riba permissible, and the need for shelter may be met in other ways, such as 
    renting a suitable house. 

    May Allaah help us and you to do that which He loves and 
    which pleases Him. 

    And Allaah knows best.