Shabam wrote:
The
drain pan was all rusted out at the bottom also (not sure if that's a
separate thing).

Many techs get commissions to sell new systems.

If your air conditioner is working OK (and not leaking refrigerant) and
the only problem is the water in the ceiling, then consider having a
contractor just repair or replae the drain pan. For a few hundred $ you
might be able to get another five years or more out of the existing
system.