Rules from p.1

• Target: $0 build (not strict, but...)
• You can achieve this by either free acquisitions, or riding, with subtracting $1 per mile ridden for over 20F, or $2 per mile ridden for under 20F (or in significant snow/ice conditions at any temperature).
• Parts acquisitions can be any time, but the primary build and all mileage has to occur between November 16, 2015 and February 29, 2016, with all entries and miles due on February 29.
• Only mileage after approximately 90% of project completion is allowed.
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• Classes:
  - Best Road
  - Best drop bar or butterfly bar Cross/Gavel/650B/Randonneur
  - Best MTB/Hybrid
  - Best pre-50's styling (single speed, 3 speed, balloon tire, etc). Newer components are allowed if keeping the classic flavor.
  - Best Electric
  - Best Cargo Build
  - Best Tandem
  - Best small wheel bike (folding, recumbent, mini velo, etc).
  - Anything Goes. Unique, off the wall builds.
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• Unique Frankenbuilds are encouraged.
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• No judges. The final results will be a poll (or several polls) with "people's choice".

As for whether you're "done" - that's kinda debatable. I'm planning to keep riding even after I hit zero.