I bought in late 2014, pre-steam. I also have a late 2013 email referencing Factorio - a RimWorld project update giving a nod to "Other interesting games you might want to check out"!
Early 2013 was the initial Indiegogo campaign. While the sprites looked much different then, many of the machines and mechanics appear to have been fundamentally in place even way back then - from robots to cars to inserters to belts.
Well worth it to get my name into the game. https://i.imgur.com/RftBXWG.png
First of all, I applaud you for squeezing that much into your life. I honestly think that's awesome.
re single Dad and Cracktorio: my wife calls it Divorcio. So I see how those go together. :)