A Mamiya TLR might work for you, especially with a normal and perhaps a longer lens for portraits. The bellows should allow you do do some close up work...but the paralax (sp?) on a TLR would have to be taken into account. Not what I call a light camera, either...but well built. Since the shutter is on the lens, it can be fixed or replaced without affecting the camera body.

http://www.flickr.com/photos/aandaph...hy/8352826656/

(I have no connection with the above camera)