Congratulations guys! The technical stuff is above my paygrade, but you have a cracked team and with open source you will have a great chance to be close or at SOTA level at your price point.
However, it looks to me that your core thesis is yes, when the autonomous robots get good enough, even at a medium family car price range they will sell like candies. Sure. But since you also want to have the cash now, to who exactly are you selling? Yes you promise that you will support the full autonomy option, but this sounds weirdly similar to Tesla selling cars promising the FSD, which we all know how that story went.
I'm not saying you won't deliver, I'm just saying you might need to a bit more careful in your story selling/narrative for this. For example, i would be super interested to get one for like 2k if it's not useful now, but paying 10k for essentially promises and possible upgrades is a bit iffy. Hence i would like to at least see some plug in and play current usecases? Even if they are just for fun.