It would be a great coffee table book, I personally would love it, you can add some anecdotes...little snippets and even other peoples tips..., you should both have some nice simple illustrations and some lovely photos. My daughter has something similar on Cosmetic Science and life style, making your own skin and household products etc, little stories and photos etc, she is on the Verge of publishing it but it took a lot to of time. There is something MUCH more satisfying to me anyway, to make something from rubbish or a find than going out to buy something similar!!!!!! Brilliant idea, go for it, simple, good to look at and practical.
You need a brain storm on here so heres my bit of input for that type of book:-
Waste not want not
More cash, less trash
£ stretcher
save money, save the planet.
tips from a happy recycle
Accidental re-cycler
creative ideas to stretch your income....
I am sure there will be loads of them, you maybe will get bits of ideas from them to0....EXCITING