I always eat my French toast with syrup, so I didn't make the soaking mixture very sweet. You can add more sweetener if you so desire.
If you multiply this recipe for your family, you won't need to multiply the soaking mixture as many times as the bread. You'll have some liquid left over from this recipe (because you need enough volume to be able to soak the bread), but you can always fry it up and eat it like scrambled eggs.