We have an only child (16, girl) and she is fully funded at this point. Kudos to you for thinking about this and making plans to properly educate your child.
We have been diligent since day 1 and had specific early goals. We do have a 529 but she's also well diversified with the money. On the 529, if she does not use it all, then she can use it to start her children's funds.
It take a lot of self discipline, delayed gratification and work. We anticipate her 4 yrs to cost around $250,000 including a study abroad plan.
I am a huge supporter of parents funding their children's education. Why would you not provide the best you can for your child?
It is important to fully fund your retirement as well. Yes it's hard but it can be done. Living debt free and below your means is also wise.
In our family... No college is not an option. My daughter would never consider that. We are financially sensible, high achievers and believe in helping our daughter start her adult life out of debt.
Check with your financial advisor for guidance if you are insure of what specific routes you need to take to make your college savings have greater earning potential.
Also 2nd what Pam has to say.