Hi
@Chickandroo ! I second
@Parront's suggestion for some desert-bred chickens, because "heat tolerant" isn't enough when it comes to the extreme heat of the Valley let alone Yuma.
As for getting a couple of types, I'd suggest buying them all together, that way you wouldn't have to deal with integrating birds just yet.
Between sapphire gem and Andalusian (I've had both at different times), the andalusian probably wins the extreme heat contest, but mine didn't exactly welcome the next generation to the flock even after a seemingly successful integration.
Hopefully between the suggestions on your other thread (regarding coops), and the advice on this thread, you'll be off to a great start!
Looking forward to seeing you on the Arizona thread!