lol adeer not only 30 but you see their 40s and not married yet, because of ghala' al mohoor in this area.
adder i understand what you're saying, and i think i recall that hadeeth and the story behind it.
that's not the case, what im saying is is wrong/sin but no sharia court can punish them for that if all parties agree to that injustice conditions.
we have many way for zawaj not right way but as long:
2 witnesses, wali, maher and consents both parties , no one can do any thing for them, even the governemtnt.
it's sin/thanbi and under thulm but no legal act one can take it against them.
will be under , between them and God. we do not judge the intentions.