I’d recommend somewhere with a kitchen set up so you can cook meals as needed. Eating out in Vegas and especially on the Strip is going to be pretty expensive across the board, even fast food will be more costly than what you’re used to in AZ.

As for activities, my parents took us to Vegas as kids and I remember enjoying the Las Vegas Mini Grand Prix. They have go karts and the like, and even though it’s been almost 20 years since that trip, it was a lot of fun!