even i use archicad since ver 6 i will never use archicad - octane plugin... and i mean NEVER
archicad SUX in texturing (and much much other stuff needed for CG) ! Its the worst program on planet for texturing and its far far away from usable.
blender is way to go for archicad users...who dont understand that now...will understand it later
I'm waiting for blender plugin which will be the best choice...
on the other side archicad users don't know how to use blender so you will have your costumers
Blender vs archicad plugin
Blender wins . . .
and blender plugin is MUCH MORE NEEDED !
anyway your competition is artlantis....