Do you really need to go wider than 65mm. Even with 65mm, the front standard alignment to the back needs to be set with micro precision with the zero detends. Remember this is a medium format camera. Imaging trying to freehand align a lens on a Hasselblad with construction putty and duct tape. That is what it would be like if you view camera has no zero detents.
Horseman 6x9 cameras and lenses are pretty inexpensive. The wide lenses in the system are 90mm, 75mm and 65mm. I got the following for about $1500:
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