Mariolina was very communicative, a total joy to speak with (very good English) and had every bit of information you could want ready and waiting for me. I've already recommended her AirBnB to friends going to Venice later in the year.
side note, the train from Mestre to Venice is VERY easy and cheap. I'd recommend that over the bus, for no other reason than comfort. It's a much nicer way to ride and is the same price.