The Praktica MTL range is worth looking at. They have a lightmeter built in that uses a single button battery, but the camera itself is completely mechanical - leave the battery out and you can use the camera just fine, shutter and everything else is true manual only. They are quite cheap to fine, and very solid and reliable. The good thing is that they use the M42 mount, so you can get some good wide angle lenses relatively cheaply. Shoots up to 1/1000
Failing that, Zenit's are my own favourite manuals. A couple of M42 choices here, and the all manual ones are exceptionally rugged. Like the MTL, good metal build, and Zenits tend to be cheaper too, as well as mechanically much simpler (nothing to go wrong), and I find, more comfortable to operate (the shutter is conventionally placed). Most of the E range are literally fully manual (not even battery meters), but the downside is that the top shutter speed is 1/500.
Zenit E and Zenit 11: Completely manual. Metal build (some very late model 11's had a plastic top panel, but otherwise all metal including film door)
Zenit TTL and 12: TTL meter (one button type battery) but fully manual camera - leave out the battery, the meter stops and everything else goes on as normal. TTL is all metal, the 12 is same as later 11's with Plastic top cap but otherwise all metal.
Lenses wise. All of the above will usually come with a decent prime, either a Praktica/Pentacon 50mm (which usually open right up to f1.7 or f2) or Helios 58mm f2, which is a lovely all-rounder.
For wide angles, you can go bargain-basement and get Prinzflex or some other cheap wide 28mm or 35mm for next to nothing (literally <£10) but they have an awful reputation. Decent wide-angles tend to be more expensive, though the old Soviet era "Mir" range to have fantastic optics and are good value and are not beyond the realms of affordability. I'm still salivating over the Mir-20

If you are on a really strict budget, it might be worth getting a cheap crappy wide lens to experiment with and find what you like doing best with it, whilst saving up for a better one.