Good Option for a Frugal Visitor
Most people want to stay in Venice proper to get the most of their visit, and there's nothing wrong with that. It is just a given that most nice hotels in Venice are quite expensive.
However if finances dictate less expensive lodgings, Casa Villa Gardenia in Mestre is an excellent option. It is family owned and run. Pictures on the web site are accurate. Rooms are ample and the bathrooms are newly renovated with shiny fixtures and tiled floors and walls. A nice breakfast is included in the price.
It is a very easy walk to the train station which is only two stops from Venice- you're there in 10 minutes and the trains run every 10 minutes.
We stayed there after visiting other cities in northern Italy and had to catch an early flight back to the U.S. at Marco Polo airport. A taxi got us there in 15 minutes.

Casa Villa Gardenia
First course - My 50th Birthday celebration
Walking Venice
Romantic view from our evening table

