Its $500k if your business is setup in designated distress areas, for other areas its $1 million. From what i hear there is something called a "Regional Center Program" where you don't have to manage. There are companies which do it for you (and manage your immigration process). You just have to write them a big fat check and hope you will get it back in 5 years :)

Just google for EB5 investor visa and start contacting the law firms!