if you won...

either going to buy a lot and build my own house or appartment

Cash winning would be real lovely. I would save up for the kids' education. Yes that's what I would do.

i will buy a lot and build my dream house!!

Well I have a Convertible Cobra already, what I don't have is it paid off. So I would first pay my car off. Then with remaining left I'd probably tuck it for a short while to earn enough to put a down payment toward a nicer house. Maybe a vacation would be nice too though, and of course I'd take a minute to just feel a sigh of relief with the stress being lifted off my shoulders. There's nothing quite like the feel of financial security!