Personally, I'd be willing to spend $14.99 on this game in it's current state, I have no idea what you guys have planned, but I like how it is shaping up. You should absolutely look for a funding source and close off the free version, or even use what you have now as the free version as a sort of "Proof of Concept" (probably not the right words I want) to potential backers for a Crowdfunding campaign. Autonauts strikes the same itch(Pun intended) that Factorio does for me. Regardless of what you decide, I'll happily back it, as long as the weekly updates continue, even if it isn't a physical game update, just letting us know what is going on behind the scenes.