You really want your chickens to forage even in a small hos lot you can make a small chicken tractor 2 feet per bird moved daily with water and supplimental feed including oyster shell. Keep the bugs down lawn trimmed and fertilized.
I would get dual purpose birds if just one kind, we use dorkings (not suggested as low layer but huge meat bird and my rooster is 15 lb has killed ravens in spring coming after the hens and chicks)
The barred rocks are good dual purpose you will get3-4 eggs per hen a week other than molt. Medium to large brown eggs yolks are almost a orange color when foraging.
Using kambucha the scoby as feed and the tea in the water along with diatomaceous earth and I have had no chicken or turkey health issues they get kambucha once a month.