I don't know whether to encourage you, or attempt to discourage you ....
It has been over 35 years since any Kowa equipment was manufactured. Even in their heyday, Kowa equipment wasn't particularly easy to find.
It may be that the kit you are considering is in great shape and will function well for you. And then again you may need service next week - and may or may not be able to find a good service resource.
I've never owned Kowa equipment, and only had slight experience with them when I was selling cameras, but they never seemed a good choice for someone to use as their only medium format system.
Others with more direct experience may very well disagree.
You might look through this photo net thread to get a flavour for the sort of concerns I have: http://photo.net/medium-format-photo...0Z2tm?start=10
EDIT: If you decide to go ahead with this, the following APUG thread may be useful: kowa-repair-service