While the file is technically a paid product (usually found on the 30x40 website or Gumroad), it is frequently sought after because of the "Free" label often attached to Eric's widely popular YouTube tutorials where he demonstrates it.
Help you find to complement your drawings. 30X40 Design Workshop AutoCAD template 30x40 Design Workshop Autocad Template File Free
This is the critical question. The official template is a proprietary file sold within Eric Reinholdt’s "The Professional Practice" or "The Architect's Workshop" courses (usually priced around $300+). While the file is technically a paid product