For a lot of parents, watching their little ones grow into an adult can be bittersweet. There are even a few times, you say you do not want them to grow up. Changing diapers is definitely not one of those times. But,as much as you'll want to be free from changing diapers, it does not pay to be in haste about it.
There is a need to set up a training schedule ahead of time to ensure that his potty training is not interrupted as a result of any changes. Set up the training for a time when you are available to see it through and if he is already enrolled in Preschool, make sure his tutors are aware also. Let them know what they can do to help his transition.