Unless it is all media hype, I would stay out of real estate. Buying and selling homes is not a piece of cake these days, but it is possible the media has entirely deceived me.
I wish there was a quick buck kind of thing, but there likely isn't. You'd probably be better of taking small portions of that money and making money of of those individual portions instead of one large investment.
If you want quick money, why build an online store? That would take a while to get you going.
Personally, I would think of something small, low-key, and simple. Nothing fancy. I'd also make sure to take my time so as to not make any major mistakes.
El Extraditable - The Extraditable.