Choice Hotels are pet friendly and they are everywhere. Sign up with them to get a member number and earn points which you can use for future stays. Their website is very user friendly and it's easy to book ahead. Many of their locations have hot breakfast. There are several brands in the chain: Earn Choice Privileges points at any Comfort Inn
®, Comfort Suites®, Quality®, Sleep Inn
®, Cambria hotel & suites®, MainStay Suites®, Suburban Extended Stay Hotel®, Econo Lodge
® , Rodeway Inn
® and Ascend Hotel Collection
One good thing: there are lots of rest areas along the interstate where you can give the doggies a rest break. I can only speak for KY, TN, AR, TX, NM and AZ since I have not traveled past KY for a long time. If you want to do a dog park rest stop, Fort Worth
has one that is convenient to I-30 called Fort Woof Dog Park
. It is very large.
Good Luck on the move - Phoenix is a neat city!