Just to be clear for the OP...the Pico five button remotes are $14 on Amazon, a great deal. The switches are, as you note, run more expensive. I have the Lutron pro hub and a bunch of picos, which I use in place of switches in a switch plates in a couple of locations.
Konke's also look interesting...I just posted a question on the Konke button driver thread about how things are going for those using them.