I certainly agree that the camera would be a better choice, espectially by virtue of greater portability and maneuverability.
Either way,the concept is an excellent one. I’ve long advocated the idea that historical organizations should proactively document significant artifacts and documents that remain in private hands. The potential advantages include:
Recording items that are historically significant, but which may never come into institutional possession;
Providing owners with documentation that might prove valuable in the event of theft or damage;
Establishing evidence of institutional interest, which may encurage future donation.
There is, of course, a necessity to maintain confidentiality regarding such records. They should never serve as a catalog from which thieves might assemble a “what’s where” shopping list.