Which sentence has the correct parallel structure?

Paying for both the bus trip and then to buy tickets for the shows will not be cheap.

Paying for both the bus trip and buying tickets for the shows will not be cheap.

Paying for both the bus trip and tickets for the shows will not be cheap.

Respuesta :

Paying for both the bus trip and tickets for the shows will not be cheap. has the correct structure for a parallel sentence.
The sentence that contains parallel sentence structure is: Paying for both the bus trip and tickets for the shows will not be cheap