One solution is diptych: forcing yourself to do two photos back to back within a minute. Then the roll can be finished in about the same time.
And I have my bulk-rolled short length film too.
I've done two rolls through the Pentax 17, and shot both as diptychs. I actually finished an entire half roll yesterday because I wanted the black and white film out of the camera.
I struggle with zone focusing because I'm not good at estimating distances. My second roll (the black and white) was better in terms of focus because I pulled out my phone and used the lidar measuring app to help approximate distance, then I just dialed in the appropriate spot based on the markings on the underside of the lens. The few images I had that were out of focus I had guessed on.