The vote totals - shown at 39:32 - don't correspond to the percentages. Assuming the vote totals are correct - and they represent 97% of the votes with the 3rd-party candidate taking the rest - then Florrick has 56% of the vote and Kresteva 41% (not 51% and 46% as shown).
The rent discussed is purportedly $60/square foot, which is in line with Chicago Loop market rates. A 20 percent discount for free legal work would only bring that down to $48/square foot, which if calculated against $22 million in revenue per year for two years requires a lease-able footprint of 3.6 million square feet to break even - a highly unrealistic footprint for a law firm.