I think it's good idea... but sometimes it so difficult to ask friends for money, even if you give them homemade food,
I know another good example,
one women prepare food for people who work in office... it is quite cheep, compare to cafe or even fast food, also more healthy )
she come to office each morning take orders and prepare food for lunch, after she brings all stuff to the office and take money
she take 15% from orders... not to much but for her it's enough
