Just a thought, since at that time of year Hotel Saturnia will be quite a bit under your budget, perhaps you can swing something special.

Some years back I had to travel from Venice to Udine on business. Udine is a fairly distant train ride away. I stayed at the Saturnia, and because someone else with deep pockets was picking up the tab, I took a gondola from the hotel to the train station.

Saturnia is one of the few venetian hotels that has its own private gondola platform. You step from the lobby of the hotel, right into a gondola that they hire for you. Now, taking a gondola in the early morning Venetian mist through the back streets of Venice, then down the Grand Canal to the train station, is something you will never, ever forget.

In your case, the train station is just a few blocks from Piazzale Roma, where the taxi cabs are. If you elect to stay there you might call the hotel and ask how much such a gondola ride to the Piazzale Roma area would cost these days. I don't remember, but perhaps the hotel and gondola would be around your 300 euro per day budget lodging budget.