You basically want to forbid her from everything, totally understandable that she then shuts down.
Why don't you agree on a compromise? You save some money (e.g. on 3 and 4 from your list), you sell a few of your apartments and maybe you can still get a loan for the house purchase (and not all 10). Then you should be able to find a solution.
Do you keep a household budget book? Nowadays that also works as an app and automatically evaluates your accounts. That makes the expenses a bit more transparent and maybe you can argue better this way. Maybe you also find a few expenses that can be reduced without your wife having to restrict herself (changing providers for electricity and , heating, insurance, various subscriptions, groceries, etc...)