Its a fair point, people like to work with different setups. However, I think this is the more important point here: If doubling your productivity isn't worth

Its a fair point, people like to work with different setups. However, I think this is the more important point here: If doubling your productivity isn't worth $200 to this company, then this company may just be a really elaborate practical joke played by an eccentric billionaire. Whatever setup you like, the company should be willing to pay a reasonable amount to get it for you.