I can’t speak to multi colour perse, however the creality K2 went on sale today for certain countries and they have a 50% off sale for a limited number of units, they sold out today’s stock but will have it again tomorrow then they will drop to 40% then 30%. Might be good if your willing to be a beta tester essentially.

The Prusa units seems to waste less filament.

How many prints do you think you’re putting through before you’re cleaning it.

I run mine through a porous rock filter (I’ll try to find the video link) every couple of months.

Typically I pre wash with Mean Green, then into the isopropyl which helps extend the life of the isopropyl.