Kent had to stop at a store to buy clown makeup....
so why didn't he just buy a costume? Why search a house you are selling for something to wear? Obviously the town has a costume shop because Kent went there to find info on the costume later on.
Also, it was interesting to watch the daily progression of costume changes. On the first morning when Kent woke up you could see that the costume was more form fitting and the divide in the front between top and bottom was gone and the sleeves progressively melded into his wrists. The materiel had a reptile pattern on it that became more pronounced as well.
Still trying to figure out why the hospital didn't try to take the costume off of Kent....