30yrs old is not too late. I now 28 and pay 3500. but feel current engineering job not suitable to me in long run as soon I will have to bring home works to do. I want spend my weekends 100% on family life.

I think you have to decide what life-style and trade-in u are comfortable with. I even consider buy house in Johor and work in SG after married. This will increase my salary "2 times" loh. Of course, that mean I have to spend more time & effort on travelling (can watch video using PSP)but I think worth it.