[dgsk]

While I commend your concern for your uncle, many things have to be addressed before this question.

Have a talk with him about your thoughts and ask him to tell you his life story and his views on life before taking it any further. From what you said, the foreign wife is only a replacement for his periodic physical needs. That is no basis to get married. For an occasional glass of milk, you don't need to own your own cow. Also, you mentioned that he is currently cash flow tight, consider that.