How much is your time worth?

Bumming around for groceries several hours a week (add the stress of taking public transit and potentially shitty weather and who-knows-what) just to save a few bucks - I'd do the logistics and numbers first before committing to that, you may end up saving way less with time and travel factored in.

I did my numbers a couple of years ago, and I had everything delivered since (probably time to re-do it now, since prices gone up for quite a few things since, though).