-50°F is great.
-Temperature stabilization is important, primarily in the first 1/2 to 2/3 of fermentation. A cold water bath would help with this.
-You'll need to lager in a secondary container at near freezing temps after primary fermentation is complete for 3 to 6 weeks (on average). You could go as high as 40 and probably still be OK, but 33°F is a much better temp.