PPPoE server/Usermanager capasity?

Hi

Im setting up a RB 1100AH to use as Radius/Usermanager (to control rate limit and access).
Will connect several routers to this (RB1100AH) with up to 300PPPoE clients on each.
Estimating about 2000 - 3000 useres total.

Do you think this will be ok?