Nikaah & Marriage Issues

Q: If a lady marries a man on a condition that he will not take a second wife and he agrees, will the nikaah be valid? 

Q: Regarding nikah witnesses on Ask Imam website it states:

The wakeel represents the bride in the presence of the two witnesses who must be trustworthy and pious male Muslims. They should not be from among the girls ascendants e.g. father, etc. nor from her descendants, e.g. son, etc. https://islamqa.org/hanafi/askimam/28924

Could you please explain the above regarding witnesses in the nikaah. Will the nikaah be valid if the witnesses of the nikaah are among the girls ascendants e.g. father, etc. or from her descendants, e.g. son, etc?

Q: I'm a 26 year old Muslim man. I committed zina multiple times with a Hindu female friend after which I felt guilty and asked Allah for forgiveness. I stayed away from zina after that.

Now my parents are searching for a good and practicising Muslim girl for my marriage but I am not sure whether it is halaal for me to marry a good and chaste Muslim woman, as I have read that a zaani marries a zaaniya or a mushrikah. Please tell me what to do.

Q: If a son and father commits sodomy with each other, will this nullify the father's marrige with the son's mother? 

Q: Is it OK to not get married. It's not that I find anything wrong with getting married, it's just that I feel that I won't be able to manage with the responsibilities of marriage, etc.

Q: Is horse meat and horse milk allowed in Islam or is it makrooh?

Can I marry a man who eats horse meat because it's their culture but he is a Muslim because in their country all Muslims eat horse meat. 

Q: I had read that hurmat-e-musaharah take place only if there was a lawful relationship. I just saw a post that if a man committed zina with a women he cannot marry his daugther. But if he wasn't married to that women and was mislead by shaitan.

Below is what I found.

On the other hand Imam Shaafi (rahmatullahi alaihi) is of the view that hurmat-e-musaharah is established only through lawful intercourse and not through unlawful sexual intercourse or touching.

Q: What is the ruling regarding the husband drinking his wife's breast milk?

Q: If a woman thinks her husbands private part is her father in laws private parts or thinks they maybe similar to her father in laws private parts, and imagines her husband's private part and maybe also imagines the father in laws. Whilst having these thoughts (she hasnt actually seen them nor does she wish too) does thinking and imagining this affect the nikaah of the woman and her husband. She obviously knows her husband's private parts are his but she just got the thoughts explained above.

Q: I am going to marry a girl with the permission of my family members and not with the girl's family. Can I perform the nikaah again infront of her family members afterwards?