Yogurt maker from Aldi is cheap & you get 6 jars. But if you already have jars from baby food jars etc, just put them in a pot of hot water, cover up really well with lid & towers you'll have yogurt in couple of hours.
I buy cheap white vinegar & use it to clean the floor, as softener... Sponges, rugs, DW tablets... are cheaper in Aldi & Reject shop. Sorry there's no budget store in your area. There's a petrol station near my place that's cheaper than Woolies even with discount so shop around if you have other options.