Does anyone know cheap rooms or campground within walking distance or public transportations to the fall ?
Thanx.

teegee
1
goldfinger
There are plenty of dirt cheap motels. I doubt the really cheap ones would be online or even in the yellow pages, maybe just show up and you'll find one. There are plenty of low end chains as well.
2

erebus
Niagara Frontier Transit Authority route maps are here. You probably aren't going to find any cheap lodgings within walking distance of the Falls.
Pro tip