Bank costs 15,000$ along with 5 steel and 10 aluminium. You will need to get iron and bauxite mines (or trade them if you don't have them), since you will don't have the ability to upgrade them, I could just buy the iron, refine them into steel and get more money. However do supermarkets as they have a very good maintenance/p. But getting steel mill in 1st day is basically impossible.