They have three vehicles - a nice new volvo SUV, a Suburban, and his F250 Ford Pickup work truck, a nice house, and all four kids go to private school. Not sure where the money comes from, but they don’t make all that much. Oh, it's not all that hard to understand. His REPORTED income is only $45,000.
In the trades, there is a little phenomenon known as "side jobs", jobs which pay in cash and leave no paper trail. This also helps lovable goofballs like Halsey keep their taxes low by underreporting income.
When you have lots of unreported , untaxed cash income, you can afford a few luxuries...
He could have been bartering as well. A great kitchen carpentry job might be worth a new SUV of your choice at the local dealership--especially if the dealer is the brother-in-law of the homeowner with the new kitchen cabinets.