Good scenario which will run you close to 50% of a gen. $2,500 is nothing to sneeze at especially when you consider you could built a 2nd franken from the savings.
It reminds me of an earlier thread which attempted to define what qualified as a franken. I think once you have a gen movement in there, crystal, crown, insert, clasp... It's pretty damn near franken. I don't include the dial because of the prohibitive costs of sourcing some dials like a PN Daytona, Comex, Milsub or Double Red. I know in many cases the dial is key but just too damn expensive!