Building 1 complete Dbase in LR

First: I want to buy LR, when it is a finished product.
There is one main condition: I want my complete folder tree imported in the LR Library. It's about 200 Gigabyte large (That's ok, isn't it?) and I don't want it to take a week to import.
I don't mind a night of importing files while I'm sleeping, but the next morning I want to get to work with it.
With my current windows version, this is not possible. - just toooooo slow.

Will my wish come true? Or do I still have to use 3 different programs...