You could simply have your shots enlarged onto backlit display film, either via enlargment
or via scanning and any number of printing options such as Lighjet or Chromira. Might be
a lot cheaper (if you can find 11x14 E-6 film at all, or anyone to process it). Since 11X15
isn't all that big as far as a printing medium is concerned, you could do the actual shooting
with something smaller like 4x5, if actual shots are even what you have in mind. 11X14 is
still avail as color neg film for a steep investment, and you might be able to contact print
that onto display film, though the final color would be different than a chrome.