My parents want me to get married, should I honor their request if I'm not interested in marriage?

I come from a culture where marriage is seen as a must. Both of my parents are good parents, they never harm me in anyway, took a very good care of me. I am now almost 30 and they really want me to get married and have a kid, they love children. I can't blame them because it's all they've ever known in their life -- once you become an adult, marriage and having a kid is a must. I am also the first child and have always been single in all my life. However I don't see marriage as a necessity. I'm not very interested in sex nor having a kid. In my mind, I just want to live a single life so I can achieve financial freedom faster (no kids and wife) then I will donate to charities and spend my time doing things I enjoy instead of always chasing more money (it's tiring), I want to do more charity work than working for money. I take care of my parents but to take care a wife and kids I'm not very interested. Let's be realistic... kids are not cheap. What's the Buddhism view on this..? am I egotistical?