It looks even tougher than merely qualifying for Boston in your age group. It seems you have to have several things go your way:
1) Be in Marathon shape year-round.
2) Have a great-paying job that allows you to pay for the many marathons, etc., buy gear, etc.
3) And ensure that job will allow you to travel frequently.
4) Find a charity that will sponsor you to get in on a few of them.
5) On the lottery-based ones, get lucky and get a bid.
I know a woman in the Marathoner in Training group (MIT) in Columbus who is a 6-star finisher. It seems to be a very rare accomplishment.
“In 2016, I started traveling to faraway places to run marathons for vacation. Dublin, Ireland was my first big destination. From there, I made it a goal to run one international marathon per year! A few of my running friends applied for the 2017 Berlin Marathon lottery, and I was a lucky one and got in! So that was my 2017 international trip and WMM #2.
“During the summer of 2017, my friend Sabrina from California started digging into the process to get into the Tokyo Marathon. We both had qualifying times to apply for the “Run as One” semi-elite program, and amazingly got in! So, in February of 2018, we travelled to Tokyo and ran the race together; my 3rd WMM. In spring of 2018, I ran the Door County half marathon with a time that qualified me for guaranteed entry into the New York City Marathon for 2018. NYC was WMM #4.