On Kirk's advice above, I rang the good people at the DMV in Polk County. They were beyond helpful. They are well aware of Escapees and help RV buyers/owners with this stuff all the time. They even told me a shortcut to the docs I needed on the Escapee website! In short, it goes like this: buy in AZ with Livingston address. Dealer sends all the forms and papers to Polk Co. I complete a form that delays my inspection by up to one year until we are back in Texas. Pretty simple! Thanks everyone.