Here in Sweden a 36 images color film cost about $25 to process.Color Film would be about $12-$15 USD / 35mm roll excluding processing and scanning.
My last calc on B/W was around $30 / roll, Film, Process, Scan - of course cheaper if you DIY.
And then you also have to pay for the film, and that’s between $10-20 depending on the quality.
So it’s not a cheap hobby. Totally understand why many develop their own film.