Switching from 20L cans to drums for our solvent mixing, any tips?

We've been buying our industrial solvents in those little 20 liter square cans for years, and I'm finally fed up with the constant stacking and restacking every time we need to pull something from the back of the storage rack. I'm thinking of moving up to something more efficient like 50 litre plastic drums that we can roll around and stack properly. Before I commit though, I want to know if anyone has run into issues with weight, because a full 50L drum is obviously way heavier to lift onto a mixing table. Do you guys use drum trolleys or pumps for everything at that size, or do you just pour carefully? Also worried about the open top vs closed top debate. We need to get a paddle mixer into the drum sometimes for blending small batches, so an open top with a clamp lid seems smarter. But then I wonder about dust getting in during storage. Anyone using these for paints or solvents and have a setup they really like? Would love to see photos if you're willing to share. Thanks.