Thanks, however I'm more concerned about getting a 3-400lb appliance (i.e. range) from the drop-off curbside into my house since most places will not bring these heavy appliances directly into your kitchen, but will deliver to your street.

I don't have any personal experience with them but learned about "air sleds" that are designed to specifically move heavy appliances like ranges and refridgerators. I came across these when I was researching if I wanted a range. And how could installers get them into position while NOT mess up my new hardwood floors. It impressed me.

They are lightweight sliders that have air pumped into them from a vacuum. Sounds like it would not be sturdy enough but they have videos of this. These are designed more for moving into position IN the kitchen but I don't see why you could not use them for your purpose. Or maybe a heavy appliance dolly from the street or garage and the air sled indoors. They are available in 400lb, 650lb, 850lb and 1100lb capacity models.

Pretty impressive videos. I have no affiliation with them at all. Just thought it was such a cool and deceptively simple tool. They even have a special Sub-Zero attachment. And designed to move over smooth floors but has a special attachment for carpet and rough floors and a spacer attachment for appliances with legs. Very interesting concept. I'm going to get an appliance installer that uses these or buy it myself to have. No reason now to damage floors or cabinets with these available.

Here is a link that might be useful: Air Sled overview w video