what fred says. Big threads print much better than small ones.
But also - yeah if you go for the 0.25 mm nozzle then a .25-0.3mm gap should work well.
You'll piss people off as the print will take a VERY LONG time.

I've printed fidget cubes with my 0.25 nozzle on my mini delta. I think I used a 0.3 mm gap for the print in place hinges. Think it was designed with 0.2mm and I added a little extra in the slicer. They print great.