a bolex will help you , i think.
may be with arc or with motor. with motor yoou need battery of course.
if you don;t need long takes arc is sufficient.
30m rolls are more compact and easy to use.
you can change them quiqly and load without changing tent.
i have a bolex ebm super16 super chic modified and proud of it.
hope it helps.
ovidiu marginean
www.cinematographer.ro