A top spec Epson flatbed+negative scanner will cost you in the region of $500. This will allow you to scan medium format film at a quality more than adequate for web stuff and also for printing up to 50x50cm.
Film costs are now in the region of $7 per roll for quality B&W and $15 per roll for quality colour. That's good stuff by the likes of Ilford and Kodak.
Development of B&W is trivial to do at home, and will cost you around $3 per roll. You can economise by reusing chemicals or by doubling up (two rolls in a tank for example) to bring this down to $1 per roll. Chemicals will last in the region of one year if stored in air tight light proof containers.
Development of colour is slightly more involved but can still be done for around $5 per roll.
Printing is where the expense comes at you. Depending on paper, sizes, inks, etc, this can set you back anything from $5 per print for a cheap mass-market lab style print for 20x20cm, to $30 if the inks/paper are better.
All in all I don't think it's that much more expensive than using a digital camera. You shoot less, you shoot different photos, you see different things. I average around 50 rolls per year through my Hasselblad.
FWIW I wrote about my experiences with Hasselblad cameras a couple of years ago : https://leejo.github.io/2017/03/08/ten_years_with_a_hasselbl...