Need a cheap waterbirth!

I was wondering if anyone has any advice on how i can have a cheap home waterbirth without having him in the bath! I've had a home waterbirth before but borrowed the pool from a friend i'm no longer in contact with. I hate the idea of having baby in hospital and also not guaranteed i'd get a pool. However, we're really strapped for cash and can't afford the hundreds it costs for pool hire. I've been looking at those big, deep paddling pools but then i'm going to need a liner that fits etc. Does anyone have any ideas?