35mm pinhole? Pre-cut frames? That is a world of really bad pain that you don't need to cause for yourself.
Can I suggest that you buy a couple of 4x5" film holders (Fidelity or Lisco; the double sided things, they're about $10 each) and make your camera with a slot in the back that takes the film holder? That way you get a decent sized neg that can be contact printed without an enlarger and it's easy to load in a changing bag without having to cut and tape anything; the film just slides under some rails in the holder. That would allow you to make high quality (contact) prints, using only a couple of trays/icecream-buckets (for developing film and paper) and a sheet of glass (to press the film and paper together when printing). No enlarger or scanner required, and you get real silver prints.
If you're cutting up roll film, you're going to have hell developing that - it'd need to be done in trays and it can't be under red light. You can't just hand over a box full of 1" squares to a lab, they'll laugh at you or charge you $5 to develop each one.
If you want to load or develop under red light, you must use ortho film. Normal film will be fogged. I think Freestyle has some pretty cheap ortho at the moment, but it might only be sheets, I'm not sure. The drawback to ortho film is of course that red things in the scene will be rendered black, and you can't use a red/orange/yellow filter on your image to get dramatic skies. I'd suggest HP5 instead as having a really good balance of features and price.
A more-expensive option is to buy an RB67 120 back; should be maybe $50ish. They have a very simple method to be affixed to your homemade camera (some sliding metal strips), and it gives you a darkslide and ability to use rolls of film with 10 exposures each, that can be developed by a lab or in a common Paterson tank - much easier than trays. Your exposures will be cheaper than using 4x5, but about half the area (still 4x the area of a classic 35mm frame though). No darkbag required (the back is designed to be loaded in daylight), unless you are going to do your own developing.
Last edited by polyglot; 07-22-2014 at 09:21 PM. Click to view previous post history.