It's very easy to do. Most people accomplish the same thing with a couple of Brute trash cans. And the Quiet One pump is cheap. Plumbing was cheap. In some situations, putting the containers in the garage and having the SW Brute on wheels makes sense. It all depends on how a tank is installed. The pump pulls 80+ gal. out of the sump in no time. And then I gravity feed the new water in. It's nice to use gravity when possible, but it could easily be set up to utilize the pump as well. This can be done in a remote location.
In a case like Vicki's place with tanks all over, it becomes a little more complicated, but certainly doable IMO. A central RO/DI & salt mixing station could be used with a movable fill hose and tank mount. With some careful planning, permanent flexible PVC hoses could be run to all the large tanks.
I am a firm believer in auto-top off, and that is easy to set up with 1/4" lines. They can be run through the ceiling, under the house, through walls, and even behind molding.
