A few years back I stayed at the Albergo Doni at the back of the Basilica San Marco, basic, cheap, comfortable and 2 mins walk from the water bus stop. Also street cred boost as you go between some tat sellers to get on to the street where the hotel is. Very quiet and “back street”-ish in spite of a central location. Would stay there again.
Before that, on the Lido, a bit cheaper but having to get the ferry every day to the main bits (although there aren’t many bus stops with that kind of view)
I loved it. One thing that’s a deffo to do is get the vaparetto #1 the length of the Grand Canal sitting in the open area at the back of the bus.
And there are public gondolas which shuttle back and forth ferrying people across the Grand Canal. Less than 1 Euro when I was there, and you can tell people you were on a gondola trip (meanie).
EDIT – I Easyjetted out and got the waterbus across the lagoon. Brilliant way to arrive.