Complex sentence: Jai comes at the end of the auction and bids more, which he got by selling his engine for the fastest car, but he doesn't have enough so the three brothers combine their money to win back the house, but it isn't enough.
Split into simpler sentences: Jai comes at the end of the auction and bids more, which he got by selling his engine for the fastest car. He doesn't have enough so the three brothers combine their money to win back the house, but it isn't enough.