Will Falconer, DVM Moderator
Assess his actual risk of getting rabies, first and foremost. Is he likely to tangle with rabid animals? Is the incidence of rabies in your area making headlines? Check your county and state database.
If not, I'd not give it. If you're not on the rolls, you won't be bothered for future vaccines as well. Just critically assess your risk and know that any damage the vaccine does will, once again, be 100% yours to bear.