To Answer your question on the tests, I was sent home at first after a few tests but due to another arrythmia with a fast heartbeat I went back to the er and after that they kept me until transplant. But in my case, I was having so many arrythmias like many per day so it was mainly due to treatment of those issues. So, the rest of the testing was done while I was in the hospital. But the normal method is a few days of testing as an outpatient. I'm sure every case is different as I became to sick to go home with how bad my heart had become. I had to be on IV drugs to keep me alive. Mine was not a normal case.
So if your someone that lives out of the area lodging may be needed. Your lucky there that summertime in Arizona is the lowest rates on hotels. I can suggest some hotels that are nice and nearby.