Nearly 8 years, here.
I started my main MLM business when I left high school, built it up for over 7 years (mostly in the UK) and sold it last November - but I still have another downline of the same business in another country in Eastern Europe too (not part of the sale), which I started a couple of years ago, and am now building that one, which means going there for 5 or 6 days nearly once a month.