New Continuous Exterior Insulation

I am in the process of replacing the siding on my house. I am adding a rain screen, 2 inches of continuous foam, radiant barrier, and replacing doors and windows. I am doing one side of the house at a time and expect it to take me about 4 years to complete. I am wondering if and when I should expect to see any benefits from the better sealed and insulated house. As each side of the house is done will I see a small bump in efficiency, or almost nothing until the last wall is done? I will be doing them in the order East, North, West, and South. Part of the North and South walls have already been done on a bonus room above the garage.