The problems of bucket feeders and PVC pipe feeders is that any animals, squirrels, hogs or deer can get to them too easily. These feeders can be emptied out in one day. It will save you time and money in the long run to invest in a timer! On a five gallon bucket, with a timer you can get close to two weeks of feeding, feeding twice a day.
Moultrie makes a good 6 gallon feeder with a timer for 50.00 or less. When it is suspended from a limb with a rope and pulley, it is easy to fill and animals, especially the undesirables like squirrels and hogs can't get to it!
The money you save on wasted feed will easily pay for the timer models in no time at all!