First of all congratulations, brew up a lot before you enter into the sleep deprived zone.
If I may say, if your going to do this go bigger, at least 5 gallons.
Second, Mesquite Honey is VERY strong. Here we call it Kiawi, and I used up 40 lbs in a couple of batches and two of them were 100%. The taste even after a year is over powering and I hope it will mellow out in time.
I would make 5 gallons, using your Mesquite Honey 1 to 3 lbs of some light clover as the base.
I consider the staggered nutrient addition a requirement, once I started doing it there is no turning back.
Download hightest's spreadsheet and put in what you want and follow it. It works, and it works very well.
I would also add the fruit once you hit the half way point. Do not boil it, just bomb it with camden tablets 24 hours in advance with some peptic acids at 12 hours in advance.
For bottling, I would stabilize the mead, and then bottle maybe a week later.
Best of luck.
In Primary: Belgium Chimay clones.
In Secondary: Braggot, pale ale, end of the world white.
Conditioning: Mead, Cider, braggot, Belgium Wheat.
On Tap: Clones, Chimay Blue, Red, Porter, malted cider.
Bottles: Far, far, too many to list.