Winding the stator and rotor coils will be an annoying part in building such a motor, so this should be made easy. One possible approach is to make the poles insertable, as shown on the picture down below.

The stator pole supports are not attached to the base, they are printed separately, the stator coil is wound on them (not shown on the picture) and then the poles are inserted inside the base. On the picture 3 poles are shown, but more are possible as well.