Depends on how much vinyl you want to cut. The software that comes with these is shit and youll need to use another program like Corel and then an interface program like Signtools.
I had a 610mm wide Chinese one for a while and it done the job OK but its measurements were a bit hit and miss. Eventually, it just cut what it wanted to cut and i couldnt get away with it anymore and splashed out on a $2000 model which guarantees tracking to 3000mm.

The plotters themselves are pretty OK if youre not a professional sign company and haver to have continuous use... the software on the other hand really is bloody awful