What is dw? Apart from the dw, I would think you are in pretty good shape with 6 cord and a well insulated home of 1800 square feet. I usually burn 8 cord from Nov. 1st to Early to mid April in my OWB and I have 2300 square foot house that is fairly well insulated. I also have a heat loop to my attached garage as well and use it some during the winter when I want to work out there. Also, I heat my domestic hot water with the OWB during the winter. I would think my heating degree days would be greater in Central PA as compared to Kentucky but not sure of that. Anyways if you could get another cord or two you surely should be good for the 2013/14 winter. That is unless the dw that I cannot figure out is a real heat sucker
Besides if you do not use all the wood you gather this year during the coming winter, it will keep for the following year and you will be that much further ahead. I dropped some damaged Hickory and Black Birch a few weeks ago, some black locust a month or so before that and I expect it to be ready by next winter. I have some oaks down too but it could be iffy for next winter as it seems to take longer to dry, especially since I cut 24" length wood. The hickory and the locust should be dry in 6 months as they have less water in them to begin with. Oh, is dw your domestic hot water?