marlin ,sounds great , but probably a pretty pricey calendar!
base cost (without shipping etc)for these at sale $9 +_for 12 pics...+-$0.75/pg...lets see ,maybe add`l reduction for "mass"...maybe $0.50 per pasge and 52 = $26 and a 365 may be $150? then add shipping...not sure how much reduction you can get on mass production..

I`d go for 52 week, prob not for 365...you miss several cars , being on vacation, etc...