What do you think about the nTB? Can I get it last 4-6 years on two USB-C, or should I eat the cost and get the touch bar model?
depends. do you currently plug in a lot?
i don't use an external monitor so just use 1 to plug in to power up each night. if i do get an external monitor it will be one that will be able to power the macbook too so i would still have 1 free usb-c port.
my headphones are bluetooth. if i do a desktop setup i'd get bluetooth keyboard and mouse
so for me, 2 is fine