Leave the power on. You may unplug most appliances, but keep your refrigerator and freezer plugged in and set to the coldest setting. Shut gas off to individual appliances inside the home if accessible. Do not turn it off at the outside meter. It will only allow wind and water into your home to do more damage.
Tape is practically useless.
Put your money into plywood instead. If you want to tape the windows after that, go with inexpensive masking tape. Strapping tape or duct tape won't stop a hurricane. I live in a development with a great deal of construction. The developer is responsible for securing the construction site.