Think about killing the bathroom, incorporate a portapotti, and allow the rest to expand....Gives you more room to play with elsewhere, significantly simplifies the build $ and room in a small space...
Your stated goal is to be out in the "woods" which allows living outside.
Cheers
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Pac NW and warmer places
1995 E250 EB 5.8 2WD on to a new owner
2006 E350 EB Elect Top 2WD