You ship them a different state?
When I was servicing regs I had customers send them to me from around the world. Literally. I had military customers on Guam, Okinawa, Japan, and in Germany send them to me because APO can ship USPS flat rate at the same price as in the states. I got one set shipped from Afghanistan with instructions to send it on to his next post in San Francisco. But hang onto it for two weeks to make sure his orders didn't change.
The majority of my reg service customers were not local.
Most of my business came from Florida 1st, followed by California and New York. As well as most of the East Coast. Florida was always a surprise but I gave good service. I had some tell me that I was faster than the shop in their town with getting them back. my 48 hours vs the local shop taking 2-3 WEEKS!
Much of this was due to that average 48 hour turnaround. If I knew the reg was coming and had tracking, it was evaluated, a fee quoted within a few hours of getting it, and if approved immediately by the owner, back in the mail to them in 48 hours.
It might take longer if I got it on a Friday and was teaching that weekend. Then it would get done on Monday after work and back in the mail Tuesday afternoon.
A full reg set should take no more than 2 hours for a competent tech to rebuild.
That doesn't mean the place you send it to will jump on it right away if they are super busy. But call them to see what it will be roughly. And ask them if there's a better time for them to get it. I loved getting regs on Monday or Tuesday. I could guarantee they would be back to them in the mail on Wednesday. Or, if they wanted me to take it to the pool and dive it for an hour, I had the pool on Thursday so they'd go out Friday.