I'm going to second what Jim Becker said. Hire a rigger. You're talking spending 4-5 figures on the tools. A couple hundred bucks on getting them into the shop is a far better idea than the risk of injury and/or equipment damage. If you already had the tools, and money were way tight, I'd say palletize and put on skids/plywood using a winch/come-along anchored to a truck. But you don't have the tools yet, so buy whatever tools you want that can fit through the door, and let the rigger figure out how to get them down there. Material handling/rigging is one of those things that is paradoxically far more complex and much simpler than it looks, and experience is really, really valuable, because experience can distinguish between the simple method that LOOKS like it will work, and the simple method that WILL work SAFELY.
Plus the riggers will have the right tools and be able to do it much, much quicker.
It came to pass...
"Curiosity is the ultimate power tool." - Roy Underhill
The road IS the destination.