I was 35. The biggest thing that will put you over the top is doing something other than flight instructing. By that I mean flight instruct but get some commercial flying in as well. It sounds like you are not going to the big schools with a marketing department buying interviews at airlines so you'll need to be very competitive with your times. Try to get some multi turbine. Age never once came up at an interview though. Colgan won't like you because you are a little older and may be able to make a decision on your own, they'd rather be able to tell you what to decide. Other than that an airline job is in your future.