Replies on Duration of Immunity and Rabies Vaccination

We have a 4,5 yr old purebred Scottie, no vaxx ever and raw-fed using primarily homeopathic when indicated.
My big concern was parvo as a pup but another no-vaxx friend said that her dog contracted parvo and because of the strong immune system it was a non-issue. Her dog quickly recovered. I did find a natural remedy, “ParvAid” that I kept handy in the fridge...it was never needed.
I have a holistic vet business not requiring proof of vaxx. When she was spayed at 2,5 yrs they requested vaxx and I said she was certainly covered.
I groom her myself.

I fly under the radar...my dogs have had 2 years in a row positive rabies titers from KS State and my vet writes letters of exception. My dogs do not get out or are left out in the yard and I told my town the dogs do not live here anymore at relicensing time. My groomer has a small shop with exclusive clientele and does not require vax records. I am careful with whom my dogs have contact.

Forgot to add: in my situation I cant live in the country. I avoid any place that requires rabies vax.. I groom my own dogs and avoid Dr WhiteCoat. When I have had to go to the vet for OSS/Vasectomy I just make up a date of the vax or say I "forgot" my papers and will bring them next time... They usually forget and never ask..
I dont travel often (due to work and the fact I have a 120 lb dog who is not as portable/easy to accomodate as my 10 lb dog). If I leave, my family watches my dogs, or if need be, I hire a live-in sitter. We have cameras in the home, as well to monitor anything.