65-18 = 47 years, 680k&#x2F;47y = 13.6k &#x2F; year.<p>Median income is 52k.  Split the difference and assume it&#x27;s 52 - (13.6k &#x2F;2) = 45K * 47 = 2.115 million.<p>So, now 680k is an extra 32% which sounds great!  Except that&#x27;s pretax, and takes ~100+k of capital to get and your get 4 years less for interest to compound.<p>If you actually work out the numbers, paying for collage adds less money than buying that much stock and giving your kids the interest from that stock while they work.  So, on it&#x27;s on a BS is a poor investment, the only advantage is it&#x27;s a highly leveraged investment.<p>PS: For comparison the median plumber makes ~49k&#x2F;year in the US.  Median electrician also makes ~50k&#x2F;year.