Try to book a hotel near Mestre train station, it only costs you 1 Euro and 10 minutes to reach Venice, train start every 5 or 10 minutes. Venice itself is stinky and expensive, not a good idea to live on the island. Check out Best Western website of their Mestre hotel, I just beck from there this Wednesday, 89 Euro all inclusive for a double room. Good deal since it's just oppsite the train station.