I'm of the opinion that too much importance is placed on charcoal brand. I could pay 2x or 3x as much as I pay for charcoal and you know how many people I cook for would ever be able to tell while eating the food? Zero.
I have a large plastic tub with a lid and I buy KBB or B&B briquettes, or really whatever briquettes are on sale and I get them home and I open the bag and dump them in the tub. When it's time to cook I literally scoop by chimney in the tub to fill it up, light them, and cook meat with them. It's really a simple process.
The biggest thing I've purchased to help with WSM fuel usage is a hunsaker vortex plate. For the 22 WSM they make a coal basket with a vortex plate on top. My buddy got one for his 22 WSM and said he uses half the fuel and it actually burns hotter and longer. For my 14.5 WSM they make a plate that just goes on top of the standard coal ring. You take out the water pan.
I'm using it today, in fact. Put two small chimneys of coals in the ring and topped with a lit small chimney. Currently on 7 hours and had to shut down two lower vents and have the other two at 1/3 open to keep the temps below 300. Haven't had to touch or mess with the coals even once. It's amazing
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Did 4 hours with the butts then wrapped and put them in the q1200 to finish. Loaded up the wings and didn't have to do a single thing with the coals. This is my first time to use the plate so I'm going to let it burn even after the wings are done just to see how long it'll burn a normal load of coals
I'm not sure this answers your question, but I thought it was a relevant option to switching to expensive charcoal.