I used to develop and print my own black and white. I've stopped - for now, because:
1. As a hobbiest, I am pressed for time with work/family. I would have rolls of undeveloped negatives...
2. Printing - printing 36 exposures per roll becomes unmanagable and is impracticle. I am from the 1-Hour photo generation. I want ALL my prints - not just a few "keepers" with the rest left on a contact sheet.
3. I don't print every day - sometimes I get on a tear, other times a month might go by... So, chemicals go bad (especially Dektol), or D76 (if that's what you use...) etc. It's also "consumable" extensive. Paper, stop, developer, fixer, etc. It seems you're always running out of something...
Plus - let's face it. Printing is a lot of trial and error... a fair number of wasted sheets, magic and fun though it may be...
Scanning is time consuming, a pain, no fun, and if you're printing your own from an inkjet (assuming you have one of the few b&w friendly inkjets) - expensive consumable in the inks...
The sheer volume of frames generated by 35mm (120 is a bit different...), if you want prints instead of contact sheets = for me, lab. The lab I've been happy with is Dwayne's in Kansas. Cost about the same as color prints - around $10 a roll for 36 frames plus ship.