Hi There,
My husband and I got his medical and police certificates completed in two days. The medical had to be done at the Clinic in Santo Domingo. It took about 2.5 hours. There were xrays, blood tests and a physical exam. We were able to do everything in the same building. It costs about 4100$ pesos.
The police record check also had to be done in Santo Domingo, but I didn't go with my husband so I can't remember where he said he had to go. He said it took about an hour. I think it cost 600$ pesos.
As for douments expiring, I am not sure as our application is in the works.
Hope this helps!
Good Luck
