1 point: For every 5 years after the age of 20 - Jason FriedmanThe mortgage, loans, and kids I agree with. But there are many wives who not only support their husbands ambition but actively encourage it. If a wife is willing to endure the Ramen years then it is of no concern.
As for the quote that I referenced from Jason Friedman above, well he just entered ass clown status in my book.
Not only is that blatant age discrimination, but there are a lot of 30 somethings and 40 somethings that have a wealth of experience that a younger person has not experienced. I have had three successful exits through my 20's now 30's and I would say without a doubt my current me is 10:1 a better individual to have on a start-up team over the 23yr old me that had his first exit (that guy was scared shitless the whole time) or the 28hr old who had his second (that guy was too cocky). The 32yr old me played it just right and the X yr old me assumes he will have it down to a blueprint after the next one.