Lighthack with 6 encoders and 6 LCD - need advice

I don't know of an arduino that could support 6 lcd displays and the encoders as well. You may have to do one per display or maybe two displays per arduino. They take quite a few pins. There are some i2c backpacks you can get for the 2X20 and 2X16 displays that reduce the number of pins necessary. I've done 4 encoders with 5 pages and a 2X40 or 4X40 display on one Teensy 3.5 all based on the light hack code

Can you please provide me with model numbers or links for the 2x40 and 4x40 displays you've successfully used?

Can you please provide me with model numbers or links for the 2x40 and 4x40 displays you've successfully used?

www.amazon.com/.../ref=oh_aui_detailpage_o09_s00
focuslcds.com/.../40x4-stn-character-lcd-c404albsbsw6wn55pab

I've also used the 2x20 displays from adafruit both with and without the i2c backpack.

You can buy one from china, needs some time to deliver, but very cheap:
www.buydisplay.com/.../character-display