Does he want a resin or FDM printer? Does his architecture software export into one of the other systems to create files that can be printed? How big?
Blender is very popular in the 3D printer world if you need something comprehensive. Can import/export many file types.
Resin isn't as strong, but the printes are much smoother.
These are resin. The rim is a 1/10th scale the Mythosaurs are 1.5" long. All are printed then painted just to see how they would turn out.