nice job..! i think.because i'm not following where you got the 80,000??
By rounding up. Originally, he wanted 0.1 -- 1.0 Wb/m^2. So I rounded up to get a bit more than the specified minimum.
but have you considered a short pulse (one second) of maybe 100A..
So far, he's been saying that he wants it to produce the magnetic field in steady state form. As for further developments, we'll see what he needs later. Though, yeah, it could handle larger currents of shorter duration.