Live small MTT rebuy strategy

Live 3-table NLHE tourney. $50 buy-in for 2000 chips. One $25 rebuy/add-on allowed in first hour for half-stack (1000 chips) ONLY if you are below starting chip count.

Thoughts? Worth adding on as soon as you drop below 2000, i.e., if you fold your BB on the first hand, would you immediately up your stack to 3000? Other ideas?

THanks.