I dont think anyone knows what is going to happen.
This is totally different to what has happened before as it is Worldwide and output is stopped uniformly. It is quite possible that things will go back to normal failry quickly, but there again they may not,
The biggest headache for Governments is timing. Get the timing right and your country will recover, get it wrong and catastrophe.
All those clamouring for total isolation, when in fact deaths are relatively low, perhaps didn't think of the consequences. And in some case still dont.
I dont think there will be a total collapse of house prices and I certainly dont thing any Banks will collapse, why should they? In fact Investment Banks have done very well, remember they make on every trade it matters not to them that the stock traded is of a lower value or going down or up.