If you are intent on building your own antenna, you need to consider a design that supports both UHF and High-VHF. The GH design appears to be an iteration of work done by folks frequenting digitalhome.ca, an impressive design with proven real world UHF performance. The coat hanger antenna is not a terrible antenna design, just not as good as it could be.
Consider the GH4n or larger, it has both UHF and H-VHF capability which is needed in your location.
http://clients.teksavvy.com/~nickm/g..._6V9_13u1.html
Then you face the prospect of needing a rotator or multiple antennas.