I think you have a good shot at WHBF, any antenna less than the HD8200U would make that less likely.
With less man made noise in the UHF band, KGAN should also be expected to be received.
KCRG is probably the easiest of the three you've mentioned.
As far as cost is concerned, besides Amazon, BestBuy, EggHead, Frys... Look at
http://www.3starinc.com/,
http://www.solidsignal.com/c/product...ennas-supplies &
http://www.warrenelectronics.com/ for mounting hardware, masts, etc.