I think this is a great idea.
There are a couple youtube videos of people with quail pens and I have even seen one where there are rabbits and quail in the same pen. This year I am going to start raising quail and am going to try them out in a chicken tractor system. My eventual goal is to have a paddock shift system that I can rotate rabbits and quail through. They will be in the same paddocks as the rabbits, but not at the same time.
I have been thinking of different ways to keep them contained. Here is my list of pros and cons on different ideas I have thought of.
1) Clip their wings
Pro: Keep them from flying away.
Con: No protection from predators.
Amount of work directly related to amount of birds.
2) Put a permanent "lid" on the paddock.
Pro: Keep them from flying away.
Good protection from predators.
Con: Material cost.
Would need to be tall
enough to walk in.
3) Put a movable or removable "lid" on the paddock.
Pro: Keep them from flying away.
Good - Some protection from predators. (depends on the lid)
Less material cost if you can share lids between paddocks.
Can keep paddocks lower, less fencing material for walls.
Con: Could be less secure than a permanent lid.
Moving the lid could be challenging.