Kahwin

Khawin (Malay) means getting married in Bahasa. What is the most suitable age for kahwin? 20, 30 or 40? For guy and girl may have different preference and different people will have different perception. Hard to say. People around me start to get married..so at the age of 20 and recently 24. Why am i still single? Is that because i don't trust married or waiting for the right one to come? How long do i need to wait? I dunno why but i think kahwin still far away from me even thought i wish to kahwin soon but financially i m not really and the most important thing is i still single..sigh..