I think that for any endeavour, whether it's business, career, sports, love, college, we should not look at the chronological age or the number of years a person has spent in it but whether the person is ready.
A young 27 year old could be ready to be CEO, a 14 year old could be ready to go to University. It's not the age.
Moses needed to be prepared for 40 years till he was 80 before he was ready to lead the Israelites out of Egypt.
That is not to say that we can adequately prepare fully for everything, there are no such things as perfect conditions, but we can remove conditions we know that will definitely cause us to fail to reach our goals.
As we plan long term, we must think, are we ready? If we want to get married, we must prepare beforehand to be ready for it. Or for business, are we ready to handle the burden, do we have the financial, social and psychological resources? Or at least have access to help?