It's been hinted at, but the Iron Curtain road gives you access to quite a few wide choices.
If you get something with the Pentacon 6 mount, you've got access to a range of decent, well priced lenses - Arsat 30mm, Mir 45mm, CZ Flektogon 50mm, Arsat 55mm (T/S or rotator), etc. Take a look at the
P6 site for the whole range of choices.
A CLA'ed P6 or Arsat variant won't break the bank either, and should be just as reliable as any other camera of similar vintage.
Here's an example with the Arsat 30mm (keeping it level):
And another, but this time not keeping it level:
And the 50mm Flektogon: