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In fact, it's almost certainly the case that there aren't anywhere near enough corporations who could or would fund major media outlets as their only business. Thus, preventing consolidation -- as you suggest -- could likely increase the number of companies which own media outlets but which also own all sorts of other non-news businesses.
Maybe. But it's difficult to envision even more multi-business corporatization then now exists. I don't know the status of blogs-sites such as this, but I'm certain it won't be long (if it hasn't already happened) before big companies move in and take over. Good for you personally, perhaps -- no criticism intended -- but not for the quality of the product, in my opinion. The more independence and focus news organizations have the fewer and less distorting the conflicts.
I realize the economics are bad right now but there MUST BE a business model that works for news organizations. Someone has to find it. Maybe you.