It's difficult to find a cheaper system than a Kiev from an initial-investment point of view if you want interchangeable lenses. If you decide to go that route, I strongly recommend the 60 over the 88. It looks clunkier, but it's a lot more robust and cheaper to boot. (I have experience with both.) I have had my K88 overhauled by Arax when I was in Kiev, and they did good work, but there was also something wrong with the camera that would have meant sending it back if I hadn't been in town, and sending your camera to Ukraine every time there's a problem may not be for everyone.
A Kiev 60 with a Zeiss Flektogon 50/f4 can be had for $250 to $300 if you look around a little bit. However, I'd seriously consider spending a little more on your initial investment. A Hassy 500CM might need a CLA, too, but prices for MF systems are so low nowadays that the relative savings from ketting a Kiev aren't that outstanding anymore.