x1 cabon gen 9 convert to wwan

Hello

i have a x1 carbon gen 9 best i7 non touch 1080p screen 16gb ram, my next work will have me go all over my country where i don't always have wifi. The mtn and serial MJ0FSQ9E in the laptop according to lenovo site doesn't say it shouldn't have wwan,

rather then buy a new laptop im willing to buy new palm rest, wwan card, sim tray antennas screws and new touchapd cable that includes the antenna power connectors.

is this thinking ok or just a waste of money?