It's time you consider mobilizing the two fathers (ur one and in-law) to share a rental taxi. One take night shift, one take day shift, you take graveyard shift.
Make sure car is running almost 24hrs daily to make your daily taxi rental worth it.
This one is optional since I believe the taxi income will be ALOT! But just a suggestion, the two mothers (ur one and in-law) will have to go Mustafa or some supermarket become cashiers.
For the kids, those that can start working, ask them go Macdonalds.
I'm sure you can get your dream house!