They could make nearly 3million just in gate receipts.......

last years average att 11200 x 13 home games (at least) x approx 20 quid average price (allowing for kids season tickets etc) = 2.9 million
Don't overlook the fact that this year, out of a £20 ticket price, £3.33 goes to Her Majesty, so your £2.9m ticket sales is really only worth £2.4m to the club.