The camera itself

A single-use film camera runs $15 to $25 depending on the brand, Fujifilm QuickSnap and Kodak FunSaver both land in that range at most retailers. Twenty cameras alone, before a single photo is taken, costs $300 to $500.

Developing, and then developing again

Getting the film developed costs another $12 to $20 per camera, and if you want digital scans instead of just prints, add a few dollars more on top. Twenty cameras of developing and scanning runs another $300 to $500.

The total

Add it up and twenty disposable cameras for a wedding cost roughly $600 to $900 once film, developing, and scanning are all included, before anyone has actually seen a photo. And that assumes every camera makes it back.

The part nobody budgets for

A meaningful share of shots on a physical disposable camera come back blurry, overexposed, or blank, and that's before counting the cameras left on a table, taken home by accident, or never turned in at all. The money spent doesn't buy 20 full rolls of usable memories. It buys a chance at some of them.

The alternative

A digital disposable camera skips the film and developing costs entirely. LatentCam's Wedding tier, unlimited guests, one flat price, costs less than the film alone for twenty physical cameras.