1. I don't want children, I hate kids. But people tell me that I will be wanting them later, is that true?
It depends on the person.
I didn't want children either. I can't handle children, I'm not cut out for children, I don't have a "motherly instinct", I have no affinity towards children whatsoever and I never really have. I have been telling people I did not want any children since I can remember, literally since I was a child. I remember telling people when I was about 12 that I wanted my tubes tied as soon as I turned 18.
Too bad I didn't, because I
had a child. (my first marriage to my ex husband, who wouldn't let me give it up for adoption)
Guess what?
Nothing changed.
In my opinion, if you are very strongly intently NOT wanting children, it isn't worth the risk to have them. Both the husband and wife should be 110% gung-ho about having kids if they are going to go ahead and have one, otherwise you really risk the stability of the marriage and that child's life.
People who strongly don't want kids (I'm not talking about people who weren't sure, or who "would rather not", but people who
strongly intently absolutely do not want kids) but have them anyway "hoping I will feel different" are potentially playing with fire -- ie: playing with the life of another human being. I learned the hard way.
2. Did you get less kids cause you realized that you couldn't afford the "big family?"
If I ever do have another child (I can't emphasize the "if" in that statement quite enough), it'll be my last, because we could never afford a big family.