Add investor business plan (draft 0.1) with its Python builder

Leased land instead of purchase, in-house cassette duplication, CD-R
duplication with CD replication shown as a separate investor decision,
Ploy Printing as packaging partner and intended co-investor, and a
dedicated section on traceability, metrology, QC and efficiency.

README.md

@@ -110,11 +110,21 @@ The detail lives in dedicated documents:
 - [Revenue model](docs/finance/revenue-model.md): rough full-capacity
   revenue (~3.7M to 6.8M USD/yr), direct cost and margin per record, and
   the levers and caveats behind the numbers
+- [Business plan](docs/business-plan/CNX-Vinyl-Business-Plan.docx): the
+  investor-facing roll-up of everything above, built from
+  `docs/business-plan/build/` (run `python build_plan.py` to regenerate
+  after the numbers move). Draft 0.1 carries the land-lease decision, the
+  cassette and CD scope, and Ploy Printing as packaging partner and
+  intended co-investor
 
 ## Repository Layout
 
 ```
 docs/
+├── business-plan/
+│   ├── CNX-Vinyl-Business-Plan.docx   Investor business plan (generated)
+│   └── build/                 Python source of the plan; regenerate with
+│                              build_plan.py
 ├── consulting/            Consultancy proposals and overviews
 ├── equipment/
 │   ├── newbilt/           Offers, site requirements, process schematic,