I've put a lot of thought into layouts for small vans, and this is the current result!
E350 Layout Design File (note, this will change as I modify the layout): https://cad.onshape.com/documents/618e73506e61a54c958d818d/w/a688358ec5e2054d5b8e7b1b/e/9e623e59add2a8890357c019?renderMode=0&uiState=66c520a449b3d52d8f374a3d
Timestamps:
0:00 - 0:48 Intro
0:48 - 1:55 Goals For This Build
1:55 - 2:26 Download My Layout (free)
2:26 - 3:30 Most Popular Small Layouts
3:30 - 3:55 Layout Overview
3:55 - 4:59 Pop Top ?
4:59 - 6:55 Slide-out Bed System
6:55 - 9:59 Passenger Side Stuff
9:59 - 12:16 Drivers Side Stuff
12:16 - 14:29 Rear Section
14:29 - 15:23 Upper Cabinets?
15:23 - 16:48 Final Details
16:48 - 17:40 Outro