Bless you all for your enthusiasm and commitment. I see a lot of hope in all this and salute you all. Maybe it's worth looking at some of the posts made by some of us oldsters/middle aged dudes about the whole thing? I am, in a way, about to FIRE at 45 in a few weeks.
It was ALWAYS my goal to get out of my day job as quickly as possible, but I admit that there was a lot of champagne, travel and -- though I wouldn't talk about it as I'm now married - mistakes with the wrong women along the way. It was really only when I got engaged six years ago that I began to seriously consider the possibility of actually FIREing: and only after my son was born four years ago that I began to "nail it", which is what led me to this site.
My point is this: I was always careful, maybe too careful, especially with my pension and mortgage (I often wish I'd saved more cash and had less in 401k equivalents) but I made room for lots of youthful stupidity, mistakes and wrong turns - largely because I was young and dumb. Please give yourselves room to grow and learn alongside your noble ambitions. Not having, or having, a day job isn't the be-all and end-all. I know guys who love their jobs and never want to retire; I know people who are financially free, and are as miserable as sin.
I also know I've had many experiences through my day job, including diving fully clothed and fully drunk into a night-club's swimming pool in Tunisia; illegal gambling dens in Kiev; dinner in the Tian-Shen mountains; listening to the muzzeins in Riyadh; playing guitar with little kids in Soweto; cocktails in Costa Rica and golf at Half Moon Bay on a Tuesday morning - all of which I would never had had if I'd walked away to do what I want to do earlier in life.
The aim of being FIREd is wonderful. Just make sure you enjoy the journey too. Ten years is a lot of life to spend waiting.
OK: old man's unwanted advice ends here.