You might not need it man. Especially since this is a no money league. When I had to do that the last two times we basically had to "sell the teams" at $150 a year. When dealing with that money, it's hard to get people to sign on knowing that they won't compete for a championship for like at least 4-5 years. By the time they are good they have invested over $600 into the league ...
It's been my experience that without the expansion draft it takes expansion teams roughly 4 years to become a contender. With the expansion draft it speeds that up to around 2-3 years.
You might not need to do it ... frankly, being an original owner, I would rather not lose someone I don't have to lose.