I have been printing ABS on my balcony at -8C for a few years now.

I use a Monoprice Mini Delta and upgraded the heatbed (i removed it from the internal power supply and connected it to a old PC power supply, heats up to about 100C).

The whole system is haused in a isolation foam box for pizza delivery…added a little plastic windo to see whats going on inside.

At very cold temps the setup needs 10-15 min to preheat the chamber but then it prints just fine.

The ABS filament roll is outside of the chamber and it dosent cause problems.