What configuration do you fly the 727 in? Can you provide us with a view of your income statement? Marketing is definitely too expensive in your case. Probably too late now, but try to fly 3-4 destinations per day with your first aircraft, whenever you start. You fly the Denver route only 6 days a week, why? The Denver flight is back after 23.00h, which is bad for pax demand.
Give us some more information and we can for sure help you more with it.