Prepare your work outside; get everything ready for yourself in the field, and after that build your house.
Proverbs 24:27 ESV

Preparation for building a family involves learning wisdom and a trade, ensuring your ability to provide for your wife and children. What good is a house if you have nothing to eat?

See 1 Timothy 5:8. If you can't provide for your own family, you are worse than an unbeliever.