If you set the drip rate to one drop per hour, you will kill the fish because water evaporates faster than that!
You don't need to do a drip at all, nor do you need to do any of the things I suggested. That procedure was intended to ease your mind about moving the fish. If this were my tank, I would fill it with water the same temp as the old tank, net the fish out of one tank and plop directly into the other. All three of us...goldfish, pleco, and I...would be happy as larks.
Make it as complicated as you wish, but be aware that you are just increasing your own stress level unnecessarily. Just reading about it...how many gallons to start, how many gallons to end, how many hours, etc...is increasing mine. Good luck with your project!