Well my barn has 16 stalls in use right now. We deep bed with wood pellets, which turn into dust once they break up. We will fill the stalls with pellets, spray them down and flip them over, spray, flip again until they break up. So each stall takes about 15 minutes or so. We do this twice a month or less, depending on the horse. We also feed inside off a round bale which we break sections off, water them then feed. We have no dust issues. And ftr we are a very busy barn with people coming and going for lessons and to work their horses. There are 2 of us that do the barn and are done by noon.
By deep bedding with pellets that break up we are saving ourselves a lot of time and it cuts the dust factor down big time if used right. We are not bedding the horses daily. You pick out the urine spot as it clumps like litter. You take out the poop and you turn over everything, sprinkle it with water and carry on. It takes about 5 minutes a stall on regular days. The 15 is when we put new pellets in.
BB ~ 2014 Trakehner Bratty Mare ~ 1993 CSHA Em ~ 2007 Standardbred