Greetings,,,
A bit of cable from a LE to another will be cheaper in the short run than an extra wireless LE/RX unit, but the LE/RX is fairly inexpensive. Once you already have a TX, then you can go either way. Each LE can have it's own LE/RX option put on it, or use wired connection from another point, as you desire. Daisy chain some, if they are near each other, or use more LE/RX or standalone RX units.
And just sitting the LE down where you want it, with only AC power wire to concern yourself with, is easier than looking for ways to run wires. Both work. Use and enjoy either way.
Keith