There are a lot of businesses that can create the 10 jobs without a problem a restaurant is one of the easiest ways that I can think of to do it, also you do not have to create those jobs from day one, I have a friend under a E visa who is a Jeweler, and he had only created 3 jobs at the five year mark when the Visa came up for renewal he submitted a revised business plan citing the global economic crisis for the lack of job creation, and was giving another 5 year visa without a problem.Agreed, you can only work with a big fund that will escrow your investment until you get the green card and will match or double your investment with their own equity and bank finance. From what I understand the main restriction is that you have to create 10 long term jobs which is pretty difficult/dangerous to do on 500,000 dollars. My friends fund apparently runs into the billions and the resort has over 1 million visitors per year. Hotels and resort services seem to be a fairly easy way to create jobs. That being said I have not done any due diligence, but if you are in the business it might interest you to take a look.
Be very careful with anyone pushing these pooled E visa's if you ever want to see your money again, I know one guy that offered me a $50,000 commission if I found anyone that would get into his pooled E visa "Scheme"
So if anyone wants to get a US Visa and has a minimum of $500,000 to invest PM me for a referral