Hi teemsum,
look
here for some prices for a water taxi from the cruise terminal to your local Venice hotel.
Click "Select from" and roll up to "Venice Cruzise Terminal), than click "To" and roll down to "Venice City hotels", add the number of persons, the number of luggage pieces and the time you want to ride this water taxi. For 4 persons and 4 pieves of luggage, pick up time about 9 A.M., you will pay cash about 106 Euros.
Be sure, that you have fixed the price with the driver BEFORE you start.
Regards
Uwe