Well, we finally did it: bought a new 2016 350 wagon off the dealer lot. Thanks for all the available information, advice and detail on this forum. This community is a great resource.
Searched and searched for months while we saved money (and bought a used Sienna in the meantime) and changed our minds many times on wheelbase, options etcetera. But, we found a wagon in Los Angeles and our local Santa Cruz dealer was able to get it and it;s getting transported this week.
We decided against a custom because there were $3500 in 2016 rebates and this wagon is missing just a few options. Here's what we got:
2016 Transit 350 MR Wagon
3.31 Limited slip
Trailer Tow Package
Heavy Duty Alternator
The options we wanted but didn't get (we're not sure if we would even use them):
-AUX Fuse Panel
-Get the windows tinted ASAP
-Remove Row 3 & 4 seats
-Build a platform bed
-Upgrade to a bigger single battery?
-Maybe add a house battery system or go with a GoalZero portable solar power source.
-Using the van as "part of my business" and will be adding a few things to get the $1000 Upfitter Rebate. Would anyone recommend Aluminess Nerf Bars? Maybe they would qualify?