I beg to differ on this.
Originally Posted by HTF III
A few examples:
A sub$500 355mm G Claron covers 12x20. I just sold a 213mm Repro lens for under $150 that will cover 11x14 as a pretty extreme WA. I recently bought a Graphic Kowa 240mm that easily covers 11x14" for $120. A second hand 210mm Super Angulon sold last week for under $900 (about the same price as two new DDS for this camera - eBay #230961535294). 305mm G Clarons are often listed, and under $500 (4 recently completed on there at the moment, $429 BIN most expensive, $212 cheapest).
Film availability should be of much greater concern than lens availability. As, too, should processing (you'll need space for at least a 14x17" tray if doing it this way).