I've never kept quail, often thought I'd like to for training my gundogs, and also I 
LOVE  quail eggs in mayo (yum yum), but over the years have been warned off by a number of friends who say they are difficult.  Apparently theirs fight (to the death 

), they stamp on their eggs, are susceptible to drafts, cold, wet and prone to mites.  I hope you have better success.  I'll stick to chickens I think.  The dogs point them as well anyway, just need to keep them safe when the dogs are out at the front.
Annie