I say do what you want I wanted to have my kids young and im loving minus for the days they drive me completly bananas lol!!
Even if your family gets upset they will come around I have 2 kids and im 22 now I was married but I wanted my kids young and I didnt want a deadbeat dad either so I want to have kids with someone who would commit themselves..
My hubby is 30 8 yrs difference as well, I think having kids after 30 is pretty rough cause you barely have enough energy let alone handle kids, all I can say is have fun!