I've seen a dryer do something I don't think you're going to get leaf blowers to do. These cycle dryers look like a re-labelled dryer I used to see when my kids were little and showing livestock in FFA. There were lots of calf dryers around, I repaired some of them, it was two, two stage 18amp commercial vacuum cleaner blower modules in a tube, one pushing air at the next. There wasn't any heater, the motors just made the air warm by cooling themselves with the air they were pushing. They used them to blow dry a 1000 lb calf, some of them woolly as a bear, cause they'd been raised in a refrigerated barn specifically so they had a heavy coat, they get washed thoroughly right before the show, even in below freezing weather. One of those blowers would dry a dripping wet calf in 5 minutes, to say it was drying them is the wrong impression, it would blast the water right off them and I mean with a quickness. I planned to build myself one of those blowers, and still might sometime, I priced the blower modules thru the Grainger catalog, they were over $100 each. But I had another use for them, excavation.
I have had several occasions to to some serious digging for some project, and I hate digging. Fact is I consider ANY digging serious. So I mechanized it, by the ingenious misuse of a good pressure washer, and a good shop vac, the vac part is where my use of the calf blower would come in. The pressure washer will do a fine job of making a slurry out of the hardest dirt, and with enough vacuum power, and a suitable sized container, the dirt slurry gets sucked up and stored until it needs dumping back into the hole. For a big enough job, I was going to use 3 or 4 55 gallon drums with removable tops and two fittings on top, one to the blower/vacuum module and the other to a suction hose and wand to suck up the mud. 4 55 gallon drums would hold a good sized pile of dirt.
Anyway, if you're thinking about buying a leaf blower to use as a dryer, I might suggest a good shop vac with a removable blower section as more useful way to have the same capability. Mine is from Lowe's, they have a variety of sizes but all seem to use either 5.5 hp or 6.5 hp motors which are easily removed from the vacuum canister to use as a dryer. And you get a kick ass wet vac to boot. In the $69 to $89 range.
With a pointy snozzle attachment to use as a dryer I have to duck-tape the tube and nozzle to the blower or it will throw them across the yard, could dent a tank maybe, but there's good pressure to work with.