Sounds like a good plan. I am currently only using one JH and it is a 8x8 that is 7 feet tall and I have it in the center of my training area which is roughly 80 acres of prime habitat for quail..
Few things to consider:
Make it tall enough for a 6 ft door.
cover sides at least 3 ft tall from ground.. I did 4 feet.
Here is a picture of mine. Sorry I dont have any detailed instructions for it but as Redhorse said I just looked at pictures and started constructing.
Recall Funnel
Good luck!
Water and Feeder