I will 100% second the Cabela's commercial grade dehydrators. I own the smaller of the two, I believe it's listed as the 80L. I run 20lbs of jerky at a time in that thing, which is about all I can personally handle in a day. I have run it pretty hard over the last 5 years with no issues at all.
I do all ground jerky blasted from a gun for uniform drying and flavoring (so much easier than whole muscle), I thaw out 20lbs of meat the day before. Mix up 4 - 5lb batches - each a different flavor/seasoning then let them dehydrate. Normally takes like 5-7 hours of drying. Between prep, drying, cooling and vacpacking it takes about all day but I end up with 20lbs of jerky out of it.