It won't be a long happy relationship if you're married to some one who doesn't share your way of life. If you're doing things which are important to you but they're doing the opposite it's going to end your relationship. You can't marry ppl you aren't compatible with.
If one's saving & the other's spending it's going to end with breaking hearts. You've got to marry after you're sure you've got an understanding.
This is actually a yin-yang combination of relationship. This is going to cause a lot of troubles and much worse, a divorce and break up indeed. Both in the relationship needs to understand that if someone works hard for them to grow and have a better life, it doesn't validate that the other partner can spend recklessly even if the significant other is saying that they're working hard for them. Many relationships are like but they teared off and fell apart because of how they think it's totally fine to spend in everything in as much as she/he wants to buy those unuseful things.