Back to topic...NE Spas has been selling spas for a long time...almost as long as Sundance has been building them. They sell agruably the two best selling brands on the market today...HotSprings and Sundance. They move a lot of spas every day. All the spas are shipped to and from their Natick MA (central MA) location, whether you bought it from that store, their South Shore store, their North Shore store or their western MA store. It is much more economical to move those via crane. The truck is stacked high with spas when it leaves the warehouse. It also eliminates any potential problems setting the spa in difficult places. All spas have a delivery cost. A smaller dealer probably couldn't do it this way, but the cost for NE Spas by crane is most likely close to the smaller dealers regular delivery. Thus the "free delivery."
The pictures of the spa being lifted over the house sure look familiar.
