Hey Tony,
this mainly depends on air humidity. A high air humidity can make rust appear on parts made of steel and that are not oiled. The hollow shafts on the rails are chrome-plated, but rust can appear on regions that are not chrome-plated.
Also sudden temperature changes (that you know from bringing a digital photo camera from the cold into a warm house and it suddenly ceases to work) can make that air humidity condenses into liquid water on the cold parts. This could also happen to the electronics in the CNC controller.
Big temperature changes (like from switching a powerful electric heater on or off) may also be the cause of play in mechanical parts, the more, the longer they are (ball screw end nuts may need to be adjusted), but can also lead to grub screws on the ball screw/stepper couplers becoming loose. Already receiving the machine via a travel through the cold into a warm workshop makes it necessary to re-check the grub screws of the couplers and the ball screw end nut a certain time after assembly of the machine. Steel has a high coefficient of thermal expansion.
I have no experience with how the Onefinity machine will behave on temperature and air humidity changes, but in general the best for a machine is a constant temperature and dry air environment. I would at least check the air humidity by equipping the workshop with a hygrometer and if necessary install a device that reduces air humidity. A hygrometer should be standard anyway where you store wood.