If big age gap, need to look at girls age.

Eg 30 year old girl and 49 year old man. Quite workable, even though 19 year gap. Coz girl already mature, more experienced in life and has much better idea of what she wants. Probably had her fun but now want to settle.

But 17 yo girl and 34 yo man is much more difficult. Girl is just a kid going into adulthood. Unless she is hulu kampung girl and they plan to live in the kampung, dont see how it can last.