Any of the suggestions made so far seem reasonable with one exception - the Seagull TLR. Stay far away from that thing. It is truly a piece of crap and will do nothing more than disappoint. Maybe there are some good examples around, but the one I got NEVER worked right. From day 1 the frame spacing was terrible and after blowing through only a few rolls of film, the transport mechanism stopped working altogether. Or rather, I should say, it worked too well. I'd load the film, and in advancing it to frame one, would find that the film had completely wound on to the take up spool. It had not stopped at frame #1. I got mine for $50 US in China, so I'm not crying over it. It was a crap shoot and I lost the bet. That's the way it goes sometimes. If bought at retail in the US, the price of a new one can run from $150 to $280 depending upon the model. No thanks.
If I were in your shoes, I'd seriously consider picking up a Mamiya C series TLR. I've a pair of C220's that I use regularly, so I speak from experience. They're more pricey than some of your Russian SLR and TLR options, but worth it. The lenses are top notch. The cameras are well built and sturdy. Look for clean one with an 80 mm. F/2.8 lens and you'll be happy with it for a long time. As finances permit, additional lenses can be added to the kit, along with other accessories like an eye level prism or porro-finder.