3d Printing Materials Used by Architectural Firms

Hello everyone! I am Bobby Lin and I just recently started a 3d modelling and printing services to help Architect, Construction and Engineering firms designed their architectural models and prototypes for their projects. We specifically target those firms who have not grasp the concept of 3d designing and printing yet, or those firms who don't have enough 3d printing facility to print their 3d models.

We designed the website to be user friendly and the architects can post their project for free and hire a qualified 3d designer to do their project. In connection to this, I would like to ask if what are the common 3d printing materials(Plastics, Alumide, ABS, Glass, etc) the architects used in designing and printing their 3d models? We are in the process of selecting 3d printing materials to offer for our 3d printing service and I would like to purchase first the one that is indemand for these industries.