Give TS a break .... only he can decides which is best for him.
Maybe the 3 years spent on growing his business outweighs his degree. If the opportunity is there, just go for it.

You can take a part time degree that is much more flexible if you want.

TS can consider taking part time degree.
I am in fact taking one from INTI KL, will finish my study by end of 2018.(Actually it is called full time evening degree course, 3 years)

You just need to spare around 2 to 3 hours per subject per day.
Sometimes in the weekend you will also need some time for your group assignment / tutorial / test etc.

Reason why I chose to attend actual degree course instead of online degree course is because you can do networking while studying with your classmates.