While not an answer to the general problem, one pragmatic avenue OP missed is to not have gotten married. Then he can have assets including a business, while his wife-in-spirit is on-paper poor and gets a subsidized plan (which then also covers the child's initial birth as an extension of her). AFAIK this wouldn't help after the children are born though (unless maybe you're willing to leave your name off of their birth certificates, which seems like a much higher level of norm rejection and outright misrepresentation).

In general corpos spend a good chunk of resources making new legal entities to escape liability and legibility - something that is simply not available to most individuals. Getting married takes your two naturally-existing legal entities and basically collapses them into a single one - throwing away much flexibility. So it seems like a poor idea in the current legal environment which has been thoroughly corrupted to extract wealth and channel it upwards.