You need "location specific" information. Is it legal where you are (assumed - yes)? What type of land are you "feeding" (agricultural, forest, savannah, pines, etc.)? Any food plots in the vicinity?
I use twin 55 gallon drum feeders (1-steel and 1-plastic) with internal funnels (1-fiberglass laminate and 1-expanded foam), 6-V battery operated (10-weeks to battery replacement), exterior slinger/programable timer (1-Day Timer II, 1-Cabelas "equivalent"), strategically located, high limb mounted (for better distribution), boat winch and cable hoisted. Each drum holds 300# of whole kernal corn. Each timer is set to feed at 30 minutes after dawn, 1 hour after dawn, 1.5 hours prior to sunset, 1 hour prior to sunset, and each feeding runs full speed for 6 seconds with deceleration, which cohntinues to feed for an additional 3-4 seconds.
My set up requires replinishment every 6-weeks. I have used these two or two like them for almost 10 years (out of sync the last two years due to hurricane losses). Here are some of the drawbacks: steel barrels rust, steel lids rust, keeper bands rust, plastic rips from cyclical stress due to wind and sun degredation, corn sours, slingers and moisture do not mix, hogs get most of the corn, humping corn bags gets old, poachers (on conservation - No Hunting - State land) will sit the fence line or boldly go where they ought not go (my land) to "cut off" or shoot the wildlife at or near the feeder, and costs never go down.
Now for the good part, the upside: I rarely miss seeing game; hogs here are a 24/7/365 hunting opportunity on private land
; does bed and raise young in close proximity; where the does are - the bucks are too; turkey use them (in large numbers); everybody wants what I've got
; my wife is "good" with: costs, my time spent replinishing feeders, my obsession with hunting, my time spent hunting, and with the meat provided; my daughter and three boys are learning skills that were never taught to me and loving every minute of it. It just doesn't get much better than that.