Good Luck Kathy, really I wish you well. We all love our chickens and chicks.
I lived on a quarter acre when i had the suburban family thing going years ago.
I would think 20 or 30 adults and a nice housing for the babies to sell and replace your adults would be fine.
Keep getting others...
Well, this one is difficult. a quarter of an acre is not enough land to raise that many birds.
However, that best part of the article was:
The 100-bird estimate doesn't count the two chicks that hatched early Monday afternoon in one of the three egg-filled incubators that are humming away in...