For a single embedded Vue dev the math runs different from a frontend pod build. One developer on a 3-month Inertia.js page-migration sprint = 480 hours at $70/hr ≈ $33,600. Compare against an agency frontend retainer at $14k/month for the same scope (~$42k all-in) or a US in-house Vue hire at $182k loaded plus a 2-month vacancy gap during search. Solo embed wins decisively for one-codebase Inertia, Nuxt content site, or Pinia store cleanup work under 5 months — once the work expands to multi-app design-system rollouts or a dedicated frontend platform team, the multi-developer build is the right tier instead.