I finely got a small 260 gallon hot tub for my wife. She wanted a big tub to relax in and I wanted an excuse to have water storage. A larger luxurious bath tub wont fit in the house with out rearranging wall, electrical, moving the kitchen and pouring reinforcing pillars under the house. Plus a traditional big bath tub stays empty most of the time and take a long time to fill up that doesn't do you any good if the water suddenly stops. That's kind of the reason to have your own water storage. I would like to have water because I am in the damned desert, the rumor mill says the well pumping stations get low or stop brining up water all together occasionally. Also incase of a fire, the logical thing is to turn on a hose and spray away but if the fire station is pulling water out of the utility or other people are wetting down their roofs or yard utility water pressure may be little to none. I am pretty sure I will have to let the water out of the tub during the winter or it will freeze and bust the pump but I should have it going for at least 8 months out of the year. To keep the water drinkable I will flush out the tub once or twice a year, the water can be used by my pressure washer or let out on the ground and will water the trees and what little grass I have. I also have an old 5hp briggs and Stratton engine I would like to turn into a pump. Its been raining a lot since late 2014 and a lot of grass and weeds have been growing so its only a matter of time before it gets dry, all that plant material truns brown and everything wants to burn again. We had lots of grass fires in 2010 through 2012.