It costs them over £300k to host those games at the Emirates, not too sure who swallows that bill though (the club or the Ladies). They charge £12 and £6 for tickets, so I'd guess from ticket sales if they pay to host it there they would be making £150k+ on a 60,000 sell out and then you would have other match day income on top.
Chelsea's Women's team didn't issue tickets over a certain amount for a match at Stamford Bridge last season as they didn't want it classed as a big event. Although my niece went to their match against Barcelona and it was used as a big event, so was packed.
In terms of the "commercial revenue" and us, I still believe the club trickles down that money from the Sponsorships the club has in general and not exclusive to the Women's team. So that would I imagine mean it could fluctuate with the Men's teams failure to get Champions League and how much is allocated.