Kids Weddings

So, doing a rewatch, and I’m at the point where Maddie is about to get married but then Mykelti & Tony decide they need to get married right away. The whole negotiation process they did was gross, but she ended up saying she would wait till December for her wedding if Kody would pay for her honeymoon. Kinda implying that Kody wasn’t paying for the wedding. So, did the kids/moms or TLC pay for the weddings & Kody just showed up to do his stupid dance? Plus, why on earth do they wait till the week of the event to try on dresses for it & find out they don’t fit?