#1 You can't keep quail with chickens because of disease transfer, and i wouldn't keep them with pigs or goats either.
#2 What kind of quail?
#3 What kind of quail? A 2 foot tall pen is plenty enough, but you can go shorter. For a flight pen i would go pretty high.
#4 What kind of quail? Coturnix can weigh about 13 ounces and bobwhites can weigh 1 pound, and some butlers can reach just under 2 pounds.
#5 I have coturnix eggs if that is the quail you want
#6 Have no clue about buying them up there.
Hope this helps a little bit. I need more info to help you more.