I still don't get the assumption that there were any development plans to allow T3-M4 to be recruited early.
Canderous Ordo's line:
"But that little T3 unit you got from Janice should be good enough to get the job done"
can be heard in the unmodded game normally if you purchase the droid and immediately go to Javyar's cantina to ask Canderous again what you need to do. It was added for him to not to tell you to purchase a droid at this point when he can clearly see you already have one.