Here's what I do...
Green-ness: 5/5 for not buying chemicals you don't need
Frugal-ness: 5/5 for spending next to nothing on keeping your house clean
Time cost: About 3 minutes to make up or top up all 4 bottles - the same ingredients in different proportions!
Skill level: Easy as!
Fun-ness: Great fun to whip up a batch of cleaners from stuff you have in your cupboard already!