Reel looks fixed to me, its a nice height to work at that is to reel in and out etc.
I run my system off my van battery...never had a problem always done it this way.
My 350 is upright and to get the reels in like i have i had to higher them so the doors would shut on them, they slot into the recess where the window is if you understand what i mean.
You could probably fit the reels on top of a layflat tank to be fair.