I remember going on vacation and bringing my camera and film. Now, to be fair, this was some time ago, so, I made less than I do today.
However, the point remains.
The film I brought with was pretty much all the film I was going to be able to shoot. I could buy more film, but of course, if I had the money to buy more film, I would’ve done that ahead of time.
Net/net, the number of pictures I could take was limited.
Say nothing of the cost of getting those rolls developed.