I think it's an extremely niche market, so I think it'll only be successful if you charge out the nose for the delivery.
Come on... this is an awful idea.
I live in a small rural town in Scotland, yet Amazon and others can deliver stuff to my door the next day. In big cities, some companies even offer same-day delivery.
Honestly, I don't need my stuff any quicker than that.
I'm sure there are some genuinely useful niche uses for drones - for example, there was a recent HN post about a company in Africa doing drone delivery of medical supplies to remote and inaccessible locations.
But I don't think it's a good idea to fill our skies with noisy, flying lithium batteries, just so you can get a pizza in 16 minutes instead of 18.
If a drone service could deliver a blender in 5 minutes when you had blending to do, and take it away again when you're done, the blender could get much better utilisation by being shared with the entire town, at a lower economic and environmental cost.
The same probably applies to nearly everything in your house.
I could see how drone delivery might work for high value items, but they could just as easily be delivered in an EV van/truck carrying hundreds of items instead of just one. One genuinely useful case might be quickly flying blood/organs to a hospital.
There is also the human cost to consider; the noise of a single drone is very irritating, I can't imagine the horror of having our skies filled with the things.
I know of course you were generalising, but in my particular case, I actually do use my mini-blender quite often (for making curry pastes) :)