Yep, sounds reasonable to me. If you're using a meridian-style water changer, where it clips on to one of the sides to spray a mist into the tank
(which supposedly and concomitantly blows off the chlorine) you don't need any holes drilled since there's a siphon tube that drains off water (into a garbage can on rollers ) while it's filling. This would be good for "stand-alone" tanks that were unfortunately not drilled in the first place.

Bill