My Wild Idea

[khabe]

You have no idea what I have seen or not seen, my young friend,
Visually your support magnet as 25 times less diameter than flywheel.
For example when magnet diameter is 10mm (1 cm) then flywheel dimensions are D-240mm x h-40mm (24x4cm)
appr. 1800 ccm what means that flywheel weights appr. 14 kg, shaft looks like ... weights one more kg, total 15kg
Your 10mm diameter x 10mm cylindrical magnets will keep this weight up easily 
I even will not try with similar tiny magnets - surely too small for - but with pair of d-13.5mm x h-100mm it works    but ... you need to think about upper magnet pair ...   contra-force from upper support pair will press your flywheel down    For real unit these support magnets must to be much more bigger.

cheers,
khabe

PS:
Perhaps question is about disproportion (vs. in proportion) of your draw - I have no idea,
And you do not need to explain me about "... rare earth ... Neodymium ..."   - I´m familiar with from the ground up.

[z.monkey]

I likes your Motor/Generator idea.  I'm doing something similar...

Magnetic bearings also a good idea, cutting the frictional losses...

NASA puts something like this in satellites.  They use the solar panels to
drive the motor, and get the flywheel spinning.  Then when the satellite
moves around to the dark side of the planet, the generator uses the
energy stored in the flywheel to continue the supply of current to the
batteries and electronics.

Then all you have to do is get it more than 100% efficient to be self-sustaining.

No worries...

That will be an excellent build...