I used 25ft yes. And it was indeed tight.
The run is down from compressor, behind and under the compressor, and along inside of frame rail. Then over the rail at the rear axle, and just outside the rail until the door. Under the door, they run angled out and forward towards the front right corner of the cabin, where I put them UP through the floor corner and up the corner interior to the head unit. Correct. I used a grey piece of ABS pipe to cover it all, and it pretty well matches the grey in the interior colors elsewhere. Not very eye catching at all, and works great! Sealed the floor holes with spray foam.