I use electric outdoor power tools, but with over 3-acres of property,
I need a lot of extension cord to reach the far corners. What I ended
up doing was getting a rolling reel intended for water hoses, but it
works great with electric cord too. I think I have 400 feet on there,
plus another 100 that I attach between the tool and the reel.

Here is my attempt to be artsy about it.

JD