Yes, the necessary infrastructure and logistics network is going to take years to build. Amazon didn't build their system overnight, either. Remember they started as an online bookstore, then branched out into music and movies, and then over time they expanded into selling everydamnthing.

Hopefully Lindell doesn't try to run before he can walk, so to speak. He should focus on providing fair prices (he won't be able to undercut Amazon) and good service with a limited selection of products at first so customers have a good experience. (That's important, because customers who have a bad initial experience will probably never come back.) He can build his product lines from there as his logistics resources grow.