Rain barrels provide water for garden hand washing etc., All water is recycled, Low cost high benefit, No brainer
I and my grandkids have been using water from rain barrels for some time.
It was a low cost project and fairly easy to build.
I already had the trash can (from a thermal mass experiment in a green house) and a friend gave me the 55 gallon drum.
I used scrap lumber I already owned to elevate the drum, a scrap piece of PVC pipe and purchased 2 shutoff valves and connectors.
I probably spent no more than $ 20.
I put a hole in the pipe for overflow & covered it with a piece of screen.
There is also a screen over the downflow pipe in the gutter.
A section of garden hose connects the two collectors.
One change I may make is a u shaped trap to further catch and keep residue entering the barrels.
This is a no brainer project.