This sounds like a good approach because it removes the possibility for consumer credit. In my opinion, you should only borrow money to make a profit on it.
"Efficiency" is rarely an objective and well-measurable metric when it comes to household goods. For every good for which that seems to be the case, like a dishwasher, there are a hundred others that would fit the definition - special-purpose kitchen gadgets of all kinds (mixers, vegetable choppers, rice cookers, bread makers, sous vide machines, toasters...), not to mention robotic vacuum cleaners, electric toothbrushes, cup warmers, etc.
If "efficiency" in and of itself is sufficient to justify making a purchase with debt, you will quickly find all of your financial resources going to paying off debt service. Then you find that instead of your tools serving you, that you are instead spending your time serving your tools.
The way out is to only spend cash (or cash equivalent, i.e. to commit to paying your credit card bill in full each month) on items which cannot generate a measurable financial profit for you.
The situation was provided by gp, not imagined. The fact that saving instead of buying on credit is being downvoted says something poor about our country.
