That was a pretty poor article. If all your free time activities involve spending money, mostly socialising in the pub from the sound of it, then maybe you should start by addressing that first. I don't follow the FIRE method but most of my free time is spent, without spending much or any money.

He also claims he got bored of eating the same chicken sandwich for lunch each day. Then prepare your own lunch before you go to work! It's not hard. Max 5 minutes