That’s the off-the-cuff figure I got from multiple sources for 35mm film and processing. I have a local friend who shoots a “Texas Leica” (120 film) who exclaims there goes another two dollars every time he trips the shutter. This is in line with the costs I’m seeing now. Tri-X ($10/roll if purchased 5 rolls at a time) and $23 for processing by a local lab. E-36 film and processing even higher. (Can’t count that against a Monochrom though.) Plus more if they do the scanning. I don’t question that it could be done for less, particularly if I was interested in doing my own developing. I’m not. Ever again.
I’d use that more expensive film at a significantly higher rate than you do too - unless I was only shooting film part of the time. I think your weekly frame count is on the low side for most hobbyists, but I can’t prove that.
I do know that I took somewhere in the vicinity of 250 images today - touring buildings that usually aren’t open to the public. I did the same shot about 175 yesterday. (Different buildings.) Those were all considered shots. No bursts. When I was shooting film an average weekend was probably 2-3 rolls. More if I was shooting an event. My shots then were safer though. I was less willing to experiment.
FWIW, I generally keep my cameras much longer than you suggest. And no, I didn’t run out and get an M11. I was just curious about where the hypothetical break-even point would be. For me the theoretical pay-off happens sometime between years one and two. (Though to be honest, I probably wouldn't hit the magic number that quickly with a Monochrom — which wouldn't be the first M camera I hypothetically purchased anyhow.)
I’m happy you find economy and satisfaction in shooting film. The numbers don’t work out for me. Neither of us is doing it wrong. It’s all good.
This was a thought exercise considering the relative costs of ownership today had I kept my Leica M6, but was considering replacing it with a new M11. I chose the Monochrom because this came about during the usual article replies about the cost of that camera being unrealistic for hobbyists. It's admittedly a torture test for the concept. An extreme example which, surprisingly, pays off more quickly than I expected. If I was trying to make a case for the economy of digital relative to film I would do so using a much less expensive camera. I could cherry-pick a used camera, but let's dance with the one I brung to the party instead:
Fuji X100V @ US$1399 divided by $30 = 47 rolls (x36) = 1692 images.
So, a little more than a month before the Fuji pays off relative to using an M6…for me. That's not considering the original cost of the M6 of course — I'm assuming that was amortized long ago. I’m also not recovering any costs for scanning, time or equipment, in this example.
or, to use your numbers…
$1399/$8 = 175 rolls (x27) = 4,725 images. Divided by 52 we get 91 images a week.
I leave it to each reader to consider this number relative to their own photography practice.
I never said film couldn't be less expensive, I said can was carrying a lot of weight.