Motor-timer units are best treated as a "cry once" decision. There are few things worse than spending all the time, money, and sweat to get ready for hunting season just to find some of your equipment has crapped out due to trying to save a little.
In my humble opinion, if I was you I would build one or two of your feeders with good stuff (12V units with "the Timer" and integrated solar panels), then hold off on the other until the fun money builds back up a little.
If that approach is not an option, I have heard good things about the Sun Slinger, but have no personal experience. I have had negative experience with several other "cheap" brands.