I'm based out of Sarasota, FL. but we could start a company where we can hire employees in various cities to go grocery shopping for people and deliver them. Anyone interested in this idea?
I think you should go for it.
That being said, I would be REALLY impressed if you could show, in advance, that the theoretical profit margin ought to be x% higher for a Bitcoin-based grocery delivery service than a fiat-based one. My understanding is that groceries is a really low-margin business, so an extra percentage point could be a big deal.
OBVIOUSLY you wouldn't start out as a super-efficient business, with or without Bitcoin... so charge a high premium or whatever to make it work. But if you could demonstrate scalability, you might get some investors really interested.
Grocery stores are a very low margin business, you're correct. However, he would be contributing to, and not competing with, their business. Grocery chains have such low profits because of the logistics of moving fresh food. In the case of a delivery service, the onus would still fall on the store itself.
OP - you really want to kick this idea up a notch?
Partner up with something like ziplist (grocery shopping/store layout app), or approach the individual chains themselves and get them to develop something similar to -
https://www.internetretailer.com/2011/10/19/mobile-app-helps-shoppers-steer-their-grocery-carts. Display a map of the store with the ability to view virtual sections, and literally choose items off the shelf (can display ads to users here as well, since there will be plenty of time spent on site and very targeted traffic).
When your delivery people go to do the shopping, the same app will guide them through their shopping list (literally telling them where to turn, what aisle/shelf, etc), making the entire process really streamlined. One of your guys could be in charge of finding appropriate coupons and BOGOs for the stores you shop from, further allowing you to increase your profit and keep service charges lower.