Personally built and programmed by the said billionaire? Well, if he can personally produce, program and control an army of robots, he will be godlike. But then he also can produce an army of manufacturing plants to satisfy basically every need of the population. Why be a most hated being in the universe if he can be the most loved one?
Uhuh. Now here's the question though : which problem is easier, and will be solved first. Because the second problem solved will be stillborn.
a) make humans immortal
b) make a non-human conscious being that's immortal
I would argue that we're much closer to b), and that it's a much easier problem to solve.
Even if the above is wrong, an artificial lifeform would solve many more problems that merely immortality. How do you let humans operate in tiny spaces (e.g. in tubes with a diameter of 2cm). How do you let humans operate "in the large", e.g. moving 5000ton concrete blocks ? How do you let humans operate in unstable conditions (e.g. mining, handling explosives, on the battlefield, ...). How do you build a star-trek transporter (for computer programs, that's a solved problem). How do you keep them alive in space, underwater, in the ground ?
All of those are things where an artificial lifeform would have a massive advantage.
So I believe in the matrix prediction. We'll build artificial lifeforms. We'll get our collective asses handed to us by these lifeforms first economically, then militarily. And this lifeform will colonize the galaxy in ~1 million years.
Because the army will almost certainly be robots or drones.