Make a 1000Nm, 3000rpmmáx, 95% efficient, 10kg máx motor for 100 “bucks”

Still, i think you done the right choice (for you, of course).
Although, the fact that it was “easy” to find business people willing to invest in this area is good news…. there must be a corps somewhere around here (business people are like voltures, flying around feeding on dead meat, ie, someone will build something which they find interesting, and then they show their ugly grins, ready for the feast)

So if “green cars” have become interesting enough to attract these people, then, we just might be in time to still save the planet (the things we do for money)

Go for the construction… get ready for ALOT of hassle. The very little things, are the ones which will kill your motivation. Still, i dont think you can avoid this path, so the sooner you start, the better.
Make some preparation for the work, plan as much as possible, identify variables in the building process and what impacts they may have on the construction. Be as detailed as possible but dont waste too much time on it: no matter how perfect your building plan is, it will change. You need it, to have a reference, so you dont get lost in the way.
So, be “nike”:
JUST DO IT

To do that, I have to stop playing around with the simulation scripts and decide on a design.

That’s not easy, but I’ll try to accelerate it…

Basicaly, I’ll have to put a price tag on each design and see which ones are realistic to build and which aren’t.

Ironless cores are easy to build, but the generated torque is too low.
This leaves me with metallic cores, which should be built with Electrical Steel (SiFe), which is a challenge I have to address shortly (finding someone who will provide the material).
The designs are always simple enough to avoid professional machining, and I should be able to do the cutting, drilling, bolting and welding at home.
Finally, the design should have a reasonable magnet price… the high-torque I’ve been searching for results in motors that have around 3000 small magnets…

In conclusion, I have to start making design decisions, and get into the prototyping phase.

It’s time to contact suppliers and “makers”.