That's awesome! I'm still in my 30's and have been saving a while but doubt I'll hit 1M by the time I'm 43. On the other hand, since I am divorced and not planning to remarry, my expenses are a lot lower. I like the ratio way of looking at it, such as saying you are able to FIRE when you can live on 4% of assets, or 3% if you want to be safer. Or its inverse, to say that when your cash is 25 to 33 times your expenses, you're basically free to work or not work as you choose.
You made mention of the $200/month in savings you managed to get from your current budget. Looking at your situation in terms of assets over expenses can be a big help there. For example, this year I will probably finish the year at something like 11x total spending, but my spending should be so much lower next year that even with my assets likely to only increase by a modest amount (assuming flat to low stock appreciation) I might be at more like 17x spending! That can be a great motivator, since it's almost always a lot easier to manage expenses down than it is to suddenly increase your assets by 60% in one year.