I need a portable baptistry

[Esaias]

I'm in need of a portable baptistry but don't know what direction to go in. Looked at Tractor Supply and saw their galvanized watering troughs (220 bux! Plus tax! Ouch!)

Is there a better, cheaper alternative? It will probably have to go on a trailer, might have to have a water tank (enclosed?) and then when needed fill up the baptismal tank/feed trough? Hate to drive around and be spilling all the water out before I even get to town lol.

Is there a better alternative?

Maybe I should go full-bore redneck, get an old pickup and tarps and fill the bed up ... heh, that would be classic.