NTGK swamy,
your desire is nice! very nice! But from what I understand archakar kainkaryam in divyadesams are passed down in paramparai. Outsiders can not. There are other options though.
We can aspire to become a gardener or cleaner or other such services (may be cook) in the Divyadesam. Perumal does not distinguish between one kind of kainkaryam and another. He only sees the level of devotion with which we engage in any assigned service. So, we may explore these other service options at Divyadesams.
On the otherhand, if we are particular about archakar service, then we may explore other temples. There are so many ancient temples in small small villages; unfortunately many of these are neglected completely or almost neglected. People who were serving there have either migrated or left this world. We may aspire to serve in any of these temples. The best thing in such opportunity is, the same Perumal Whom we get darshanam after so much difficulty in big big divya desams, we can serve Him in ekaantam in these small temples. Probably this will be more pleasing to Him too.
Please consult your acharyan swamy before taking any such decision.
adiyen dasan.