How much would it cost to get from New Orleans to California?

My fiancé and I want to road trip from New Orleans to Los Angeles and back. He said he'd like to stop in the Grand Canyon and we have family in Los Angeles to stay with so we'd need to stay in a hotel maybe 2 nights total? For food, gas, hotel, etc what would be a good price? I drive a Honda Accord so it's great on gas. Just a rough estimate would be nice

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