The one above is along the lines I am thinking..but with small wheels on one end and handles on the other for easy movability.
Some of these are quite small..and some quite elaborate..allowing eveyone from urban homesteaders to country folks to raise 3 to 20 birds.
To plain and serviceable...
To Bare Bones Basic! The above website has DOZENS..It's very inspiring! I can already hear my husbands *sigh* of resignation!