There are a couple of other quick customizations you can do:
Descriptions
You can give a warp a description by adding the description to the end of the command when creating the warp. Like this:
/travel warp create <WarpName> <Description>
The description will look like this:
(/travel warp create Teleporter to Coral Reef)
Exact Pricing
If you need the prices to be exact and compare names, NBT tags, or anything else, set the "exactPrice" option in the config to true.
This is what it looks like if I set the price to a gold nugget named "Coin" (Though, you should also have an NBT tag to prevent players from just renaming items. Prevent tax fraud!!!!)