Congrats! sounds like you are well on your way!
I'm not sure exactly when my wife and I hit it, but currently we're around 115,000. So it was probably within the past few months. This includes all of our retirement accounts, taxable investments, and cash savings. We are both 26, so we're off to a good start.
And yes, with an average year to date return around 18% for all my investments, definitely gives it a good bump.
Updated: As to how hard it was.....it didn't seem hard as its mostly been on autopilot for the past 4 years. Set my rates for 401(k), roth, taxable, and cash. The leftover is what I live on and that amount hasn't changed much for 4 years. The only significant change I have had to make was the extra expense of owning a house over renting an apartment. Which caused a slight reduction in our cash savings rate. Yes, the not buying crap is key to a high savings rate. Throughout my working career I am sitting at a 32% savings rate. With some recent optimization after finding MMM a few months ago our current savings rate is closer to 45%.