Get all the training that you can. The world will largely pay you what it thinks you are worth. It is your primary obligation to provide for your family. Your wife will be fortunate indeed if she does not have to go out and compete in the marketplace. She will be twice blessed if she is able to remain at home while you become the breadwinner of the family.
Education is the key to economic opportunity.
It is likely that you will be a better provider if your mind and hands are trained to do something worthwhile in the society of which you will become a part. Be modest in your wants. You do not need a big home with a big mortgage as you begin your lives together. You can and should avoid overwhelming debt. There is nothing that will cause greater tensions in marriage than grinding debt, which will make of you a slave to your creditors.