Its for watering my garden. I water primarily with rainwater. Otherwise I have to lug my watercan to the spigot on the otherside of the house. For me, rainbarrels are a godsend. I have two 55 gallon ones in conjuction with this one.
As for effort, this took me 20 minutes to assemble. Not hard or time consuming.
For me its not about money, its about increasing my rainwater storage using what I had lying around.
We usually get hot dry summers and I have a well. Any water saved from the ground is important.
I always said tomato and basil are the basis of Italian cooking because if all else dies, they will always survive.