Frostbite has since been reworked to be general purpose. Which saves money for the company overall. But Battlefield games are more ambitious after every game than whatever Remedy has been doing. Not that Remedy isnt doing anything creative (or good) but battlefield games keep upping what you can do in the game for multiplayer or single i player in terms of scope and complexity (good or bad). Increasing the players, weather, weapons, mechanics, destruction, modes whatever in a more open sandbox deals with multiple concurrent user interactions whereas Remedy is building third person shooters with characters, weapons and levels swapped out + some game specific mechanic. If battlefield was just making new single player FPS (multiplayer adds a whole lot more complexitiy and testing i.e. more money) every few years then yes they can probably make games with smaller budgets. But if they are going to make games at the scale and continue to do new things, thenit will cost alot of money.