$400, Buy some beaches. Then blow the rest on other crap.
I'm sure you can find beaches that are less than $400 and still have money to spend on other crap.
A gumball.
Turtle Beaches. Are $200.
Buy a new graphics card so you can run Bl on max shaders.Buy lots of gamesBuy 4 xbox 360'sBuy a new computerRent a Dedicated ServerBuy a TVBuy really nice headphonesBuy a nice phoneBuy a Nexus 7 or 10Buy several arduinos and compenents for themget $50 buy printerbot jr http://printrbot.com/save itbuy more consolesbuy things you didn't think you could ownsave up for a carbuy a nice camera.
More music stuff, new computer, more Wii games and a small ISLAND THAT IS 100 FEET LONG
that's way more than $3000i think you've misjudged the budget
A $400 hooker or 400 $1 hookers.
Move to California.