Yes, what I am thinking of doing is taking my 1000 litre tank and Ionic Pro 5 system from my Movano, and sticking it in the garage, turning it into a static system. Keep that full most of the time and then nip back {most of my customers are local to me} if I| need to fill during the day. I would like to have a trailer system as well in case I need a lot of water in one day a little further afield.
When I started WC which was only 12 months or so ago, I intended to go after the bigger stuff, large residential and commercial but the way I feel now is leaning to the domestic side more.
Having a smaller vehicle should be cheaper to run in fuel, safer, cos you don't have a ton of water three feet behind you and easier to park. I sometimes drive round Tesco for ages before I can park up at the weekend!