Learned a trick a long time ago, and it has come in handy a couple of times. So I'll share my latest project.
To get the doors aligned with evenly thick gaps, do the following:
Build the doors as a unit
Mount the door's part of the hinges
Place the entire unit in the door opening and wedge for even gaps.
Mark where the other part of the hinges should go by holding them in place and marking for the screw.
Remove the door, saw in half in the middle. Screw on the hinges. Put in place.
My doors lack door stops and a drop bolt in the picture, that'll be tomorrow….