Hi @Hielkio I’d second @wirlybird’s recommendation for the Prusa, I’ve had a Mk2 for a year now printing virtually every day and it’s a good reliable machine. Proof of that is how few posts you’ll find here troubleshooting problems with the Prusa. My only problems have been those associated with 3D printing in general and which affect many machines, the greatest of which is probably bed adhesion - either not sticking enough or prints welding themselves to the bed. For the bed adhesion, I’m very interested in the Mk3’s removal, bendy, magnetic bed, IF it works as well as promised, it could make life a lot easier.
Kit or pre-built? I bought my Mk2 pre-built, but recently upgraded to the Mk2S which requires pretty much stripping the machine down almost to its component parts (slight exaggeration), that experience has suggested to me that the kit is probably not that difficult to build, and if you got the kit you could spend the spare cash on the multi-material upgrade, or some spare beds, more filament, etc. I’d really like to fit the MMU to my Prusa, not so much to print in dual colour but to enable printing with soluble supports.
The CR-10 is an interesting machine, it’s had some great reviews and if I had money sloshing around I’d almost certainly get one to expand the farm, but as a choice between the Prusa and the CR-10, I’d go Prusa every time.
The Tevo I really don’t know.