Sounds like you may have your own answer to your own problem that's great.
keep us up to date with the Turkeys and how things work out we all learn from others experience's.
That mobile coop is one fancy palace.
You are right about the Turkeys flying and soon at 6 weeks my Red Bourbon were flying 4 to 6 feet that's when I clipped there wings.
My surrounding fence is only 8 feet high with no cover on top and surrounded on 3 sides by woods the forth side is my yard...