Lesson 1 No, one gallon of paint will not be enough. Buy at least two. Lesson 2 Water based paint will not wash out of your favorite shirt but it will wash out of your holey pants you had planned to just toss out after this. Lesson3 Paint drops will not land on the ground if there is any part of your body or hair they can land on. Lesson 4 Paint will cover 4 inches square if it is painted on but 18 inches sqaure if spilled. Lesson 5 The soft sand spot you put out for the chickens to fluff in ... other animals will enjoy also before you get the fence up. Lesson 6 Do not dig in the forementined sand for any reason the next day. You will have have been gifted by the animal that used it for something other than fluffing. Lesson 7 No the tape measure isn't lying. The distance must have changed after you cut the board. (banging head on door) Lesson 8 Any nails you dropped you will find. Just drive over the area once. Lesson 9 The sharp edges on the chicken wire will poke through gloves. They will also fit right under your fingernails. And scratch the paint if you try to slide the wire into place. I'll probably have more later .......... Murphys Law is in effect here! LOL Everyone feel free to add building lessons you learned the hard way! Oh and paint barn siding before you put it up. Learned that way too late.