are pretty good for figuring out option codes but remember, they are not updated as often as the Jeep site and some options may be on the list but not orderable due to restrictions only your dealer will know about.
6 - 8 weeks is what most dealers tell you, 8 - 10 is probably more realistic
Power liftgate is only available on the Limiteds and Overlands
Only the dealer will have the 730N order availability, it's too new. All 730N's from now on are RHR, the RER is done, stick a fork in it.
Go to the capabilities tour section of the Jeep site, it will tell you what features are available on which models. but remember, they may not all be orderable due to restrictions. In fact, I thought I heard the V8 was on restriction on the Laredo's, that might be why it doesn't show on the Build It section of the Jeep site.
NOTE: I just checked through the NADA site and they seem to be current, showing the correct pricing on the 730N as well as current ordering availability of certain packages. It looks like the 730N is only available on Limited and Overland and cannot be ordered on a Laredo. Just buy the Overland and be done with it