Carina & Maya Finances

I am rewatching and currently I am in mid season 7. I am just trying to understand how Carina went from driving a Porsche to Hyundai. And what is that small and kinda ugly house they got when Maya had such a beautiful and spacious flat. Can someone please explain?!

Edit: I also checked like OB/GYN average salary in Seattle is around 350k per year. And Lieutenant Firefighter's is 105k. 2-3 bedroom house rents average is around 4-5k a month. They make like 37k per month. I know IVF is expensive like around 20-25k per cycle and they need to think about the kids and save for the future but come on! They should be able to afford a better house.