We know how those TV contracts work. In fact, my husband worked for TLC last year and used to do the show promo commercials for J&K+8. This show is a way of paying for the kid's future. The trips and stuff are a way for them to try to be a normal family. How many families do you know of with 2 kids that can't afford to send them to college, let alone 8? They would never be able to afford any of this on John's salary, if they didn't make the choices they made.
Plus, it's not easy to shut a TV show down, when you've signed a network contract for a season. The only way that happens is if the network shuts you down instead. You are fully obligated under threat of lawsuit to complete and fulfill your contracts. They can choose not to renew next season, but since they had already signed for the season before this happened - they were screwed, too.