From the senate statement; " a minimum of $250,000 -- into the immigrant's startup venture. If after two years the immigrant entrepreneur can show that he or she has generated at least 5 full-time jobs in the United States, attracted $1,000,000 in additional investment capital, or achieved $1,000,000 in revenue, then he or she would receive permanent legal resident status."
My personal thoughts are that it should be possible to start a company overseas, get far enough along to secure $250k in VC funding. Also, I would be surprised to find a successful startup that can't get $1m in revenue within 2 years.
While a VC can control additional investments, they have less control over revenue than most founders. A successful start-up should not be dependent on VC funding after 2 years unless it grows exponentially and needs the funds for growth.
Also the terms after 2 years are less than for an existing EB-5 visa.