3K is a basic, reasonable investment, IMHO, and I do feel I'm the little guy.
Here's what I recommend to anyone not willing or able to come up with 3K initially. Open an account with Sharebuilder, and start investing in companies or funds every week. It's free to Join, no minimum, and only $4 investment cost.
Then, come back to FOOLX in a few years. See if, after you've been investing on your own for a while, you believe in the foolish investment ideas. Maybe at that time the fund would be right for you.