that means the budget was something around $100 million...
"Something I heard" is not a really valid source.
Is it something actually mentioned in a news site or something you heard other people say in a forum?
given the fact that it had a development team of over 600 people, the largest in Capcom history.
Ah yes, the "600 staff" thingy. I knew this will turn up.
Just like how you don't know the game's exact budget, you don't know how much of the "600 staff" are actually working directly on the game or are outsourced from other companies.
A lot of people like to just read the headlines and never the actual article.
The same news where the "600 staff" came from, Kobayashi specified "150 from Japan".
Capcom outsourced stuff like motion capture and orchestra composition to overseas companies, so that's probably where a portion of the remaining 450 staff are.
In cases like these, Capcom would most likely only pay service fees and not actually pay the wages of every people involved.
Unless you know how wages in Capcom works or know exactly what the "600 staff" actually do, I'd recommend not to take it too literally.
Ultimately, none of these data ("600 staff", etc.) are anywhere near in giving a tangible conclusion on RE6's budget.
Even so-called "video game budget" lists you find online are simply estimates from analysts (because companies never publicly release their actual budget), so it's not convincing that one can accurately tell a game's budgets based on some vague hints.
