Why assume the upper level salary here? Using senior level developers making astronomical salaries for what is a mechanical line-by-line port would be a poor financial decision.
What does the math look like with 25 devs making ~100k and doing it in 22 days? I’m sure you could find a reasonable combination which costs less. And if you’re already paying the devs the salary, it’s basically free (minus the opportunity cost of them not working on other things).
> Why assume the upper level salary here?
Even a junior is going to cost you $200k by the time you're done paying payroll taxes, healthcare, etc.
Nonsense. Junior salaries are on the order of $50k in the UK. There's no healthcare to pay, but employer taxes and overheads might be around 30%, so you're talking way under $100k.