Quoted from Flipstream:

Tables are heavy, plus another 20-40 pounds for the boxing/crating; the Stern JP flyer says 280 pounds boxed and 250 unboxed. Unless you have a forklift or a hand truck plus ramps to get it out of the back of your vehicle, that's going to really suck to dead-lift to the ground. If you can get a reasonable price on at least delivery, I'd say it's likely worth it to avoid loading/unloading hassle if you aren't equipped for it already.

You shouldn't have to do much more than standard assembly, inspection, and leveling if anything. The only additional step for a NIB that I know of you may not have done with used machines is wipe the oil off of new pinballs before loading them in the machine.
I would think if there is a major play-prevention issue with the table (i.e. DOA electronics), a shop person is likely going to be just as stuck as you would be unless they happen to have spares. I'm personally opting to pay more for installation because my table is going upstairs and they have the equipment to make that a much easier process.
Call and talk to your shop, find out what delivery and install costs are, and what they can and will help with in the event of unexpected problems. Then you can make an educated decision if it's worth it and/or get some added piece of mind with your new table setup. You're about to spend $6k with them, they should be more than willing to answer a few questions on delivery and install options

Quoted from J-Freeze:

Same