ER.org sounds about right for you.
If your net worth is sub $50K and you are thinking of early retirement, I would say cheap rv living . com (aka living in a van down by the river)
For net worth around $500K, MMM
For net worth around $1M to $5M, ER.org
For net worth of $5M to $30M Bogleheads
For net worth of $30M+, you shouldn't even be wasting time on a financial forum.
I don't know about the cutoffs. Certainly BHs is quite different than here but their fairly exhaustive anonymous survey doesn't have many people with NW above 5M.