That's pretty impressive - a section of men with one truck (for bringing the shelters to the site), a JCB (preparing the site, lifting the shelters off the truck, dragging out them out and then burying them later on with earth), a large fan unit (and generator to run it) and a hose pipe could set up a medical facility or a forward base in around 36 hours - and a lot of that time would probably be setting up their own tent for their overnight stay, the filling of sandbags for the entrance-ways and then burying the shelters the next day. The actual inflation would probably happen while one team was soaking the previous shelter and while the other team was dragging the next into position.
24 to 36 hours after they turn up at the site, there'd be a base ready for staff to move into and 48 hours later, it'd probably be fully operational.