It's ok. Roll film is cheap.
I know that's heresy here, but it is. 36 is way, WAY too many. Rolls sit in my 35mm cameras for months sometimes. I find 12 in my 6x6 about perfect, and 15 in my 645 is ok too. I wouldn't have a problem with 8.
Besides, those of us used to 4x5 are accustomed to a buck and up every time we open the shutter (black and white, dramatically more for color.) Getting eight shots on a roll of film that costs $4-$5 is not expensive. Of course it IS if you're the machine gunning type who started with digital, or are even accustomed to shoot a couple rolls of 35mm per outing. If you shoot those same 72 shots, it's going to cost you.
Years ago there was a saying that "film is the cheapest thing in photography." It wasn't really true then and certainly isn't now. The cheapest thing in photography is a look through the viewfinder. I've probably set up the 4x5 and composed, focused, swung/tilted as needed...then decided not to pull the darkslide and expose a sheet of film, more often than I actually HAVE made the exposure. Eight shots on a roll is a tool to build discernment.