If you drive your own vehicle you have to factor in the variables such as wear and tear, gas, mileage, etc. If the truck or vehicle you are renting is stolen then it is your responsibility. Most often times moving trucks are targets for thieves. In order to protect your belongings, you will need to rent padding. An appliance dolly, utility dolly, or furniture dolly is most often needed to move large boxes, furniture, miscellaneous items, etc.
Some details are more time consuming than others.
The major tasks are packing and unpacking. You also have to factor in who will be driving the rental vehicle, who will be driving the family vehicle, etc. Make sure you add about 10-12 more hours for incidental last minute details. Figure in packing time, move preparation, picking up the moving vehicle, load time, drive time, hotels, food expense, gas, unloading time, etc. In order to make sure that your valuables are protected properly, you should purchase specialized boxes for your belongings.