There are lots of decent ebike options < $2000 and they generally require very little maintenance.
$1000 for inner tubes, break pads, and chain grease is not a reasonable estimate.
$1000 for inner tubes, break pads, and chain grease is not a reasonable estimate.
$1000 would probably also include things like cassettes, chainrings, chains and brake discs. Depending on the system on your bike this stuff can get quite expensive.