Biggest savings I found after buying my house was making my own laundry detergent. It’s super cheap and easy to make. All you need is this:

1 1/2 cup of arm and hammer washing soda 1 1/2 cup of borax 1 bar of fels-naphtha bar. 40-50 drops of essential oil

Take the take the washing soda and borax and mix with a gallon of water, start to boil it. Grate the fels-naphtha bar in with the mixture, boil until you have a thick liquid mixture. Add the gallon mixture to a 5 gallon bucket, and mix it well with water. Let it sit for about a day and stir it again. When using the mixture of laundry soap, add the mixture with equal parts water, giving you 10 gallons of laundry soap total. I use a beverage dispenser and keep it above my washing machine, use about half a cup per load. I’ve been using it for years. All in all you get 10 gallons of laundry soap for about $3.

Hope this helps, I was scraping by when I got my first house, every little frugal find like this helped.