I've had a Remington Spinning Feeder for about 5 years now that I bought at Academy Sports and Outdoors. It was only $99 and it holds 40 Gallons of corn and has a timer with 4 feeding times.
Has it been reliable? Absolutely.
Did it cost an arm and a leg? Not at all.
Has it lasted a long time? It's been running for 5 years, you be the judge.
I will say, I had a little bit of a struggle at first setting up the barrel and legs, but a buddy of mine bought one the following year and they had resolved that problem.
As for year round feed? If you are just trying to bring them in, corn will work great and it is relatively cheap. If you are trying to grow bigger antlers and the such, you'll need to look into some of the mixes although they've often been reported to clog spinning feeders because they can be sticky.
You may check out resources like Texas Trophy Hunters Association for more information on growing big antlers and what to feed. They always have lots of information on the likes of feed and feeders.
Good luck finding a feeder.