Compared to many other federal expenditures, that’s a tiny drop in the bucket. Plus, it saves money by being very secure for the first family.
My mom lived in Thurmont for a long time. There was an historic restaurant/motel there called The Cozy that showcased pics of Camp David and celebrities and Presidents who had stayed and dined there. Sadly, Cozy was torn down last year. Used car lot now in its place.