Short answer
Different financial backgrounds can be managed when both spouses understand each other's expectations and avoid judging one another by wealth.
Islamic Guidance
What Islam teaches
Islam does not make family wealth the measure of a person's honour. Character, faith and conduct remain important considerations.
Practical Guidance
What you can consider
Discuss lifestyle expectations openly and agree on realistic standards. Neither spouse should be humiliated because of a less wealthy background.
Sources
Qur'an 49:13; Qur'an 30:21.