Congrats on your land pruchase. Many years ago when I was a tad bit stronger, I built a red oak log cabin with my trusty Stihl chain saw. I had all the oak on site and used a round saddle notch fit. This is not for the meek of heart due to the extreme exhaustion but well worth it. If you have enough standing timber to cut some lumber for building, your overall costs will be greatly reduced. I my though is don't undersize your cabin as it will quicly get small. 576sq' with a 1/2 loft makes for a pretty good size family camp/cabin. It would measure 24 x24. This footage allows for a (L) shape lower floor plan having 1 enclosed bedroom, bathroom. The L shape then is kitchen, dining room, and living space all open. The sky is the limit and part of the fun of building! Good luck and again congrats.