What is the solution to the problem of engagement from the fiancée's country, where he discovered that the dowry is beyond his means and he cannot collect it except after years, knowing that the girl's share of the dowry does not exceed one-third, and he can marry from another place for one-third of what he would pay?

Facilitating dowries is a legitimate Islamic requirement and a prophetic guidance. If you have not yet solemnized the marriage contract with the girl and the dowry burdens you, invite her father to lighten it. If he refuses, there is no sin in dissolving the engagement and seeking another. However, if you have already solemnized the marriage contract with her and then divorced her, she is entitled to half of the agreed-upon dowry, unless she waives it.