Currently, it's easy enough for me to get water from my clients (I have an unusual client base where hardly any of my accounts are inhabited). I can see a time coming when I won't want to be relying on using client's water for my mixes, though. I'm "thinking" a 50gal. nurse tank would be sufficient for me. I'd like to mount this on the tongue of my trailer. Finding the tank, itself, is pretty simple. Finding a way to attach it to my trailer tongue is a little harder. Suggestions? I've never tried to find anything like this.