I am certainly not in the high performance turbo category like Wiz!
I am closer to the creeper gear category by comparison! I have one 6hp shop vac moving the material and it will nearly fill the 15 gallon barrel in about 2 min. I sometimes have to tap on the 2" pipe with a rubber mallet to 'prime' the flow and get it going, a couple slugs of coal get pulled through and then it transitions to the smooth flow you see in the video. But most times it takes off as soon as i cover the outlet pipe.
Regarding cost, besides building the bin (which I have about $350 in) I had everything on hand except some 2" fittings and the pvc toilet flange for the bottom of the barrel, so maybe $25 out of pocket tops. The barrel was a liquid clothes detergent barrel from the local hospital they were throwing out. I still have a couple here if anyone is traveling along I95 through MD/DE and wants to pick one up for their own system (shipping cost wouldn't be worth it probably). The PVC pipe was all scrap pieces... since I don't have any sections longer than 4' I found a use for some of those cutoff's I kept over the years. I already had the shop vac which I can still use elsewhere because i just swap out the flex hose at the shop vac end. I swapped out the filter bag recently after cleaning out the fly ash, I'll probably do that again this year so 3 bags per season, but I am also using that vac for cleaning the basement too so it's not just coal dust in the bag.
Hopefully, after 21 years, no more buckets for me - as long as the coal in the outdoor bin doesn't freeze, that dang rice coal holds moisture. I am optimistic because a couple weeks ago the extra coal I have in the bunker covered with a tarp did freeze while the stuff in the bin did not. Jan/Feb will be a better test to see if it is drying out enough in the bin. I bring home about 1 ton at a time on a trailer, scoop/push it by hand into the loader bucket and dump it into the outdoor bin which holds just under two ton. Anyone want some well used 5 gallon buckets darkened from years of coal use?? If I could just get my PA coal guy to tag his delivery truck for MD I'd take 10 ton at a time to my coal bunker, loader it from there to the bin and that hand shoveling off my trailer would be history too!
edit to add, I get no credit for the video, that was the kid's project. I only contributed to the content of the comments and got it converted to a format for uploading.