Not sure about the home made frylight- I started sw in march and have only just had to buy my second bottle. I know its quite expensive but it has lasted well.
My OH is not keen on artificial sweetener so tends to use honey and syn it. You could use maple/golden syrup or use cooking methods/ingredients that naturally sweeten- roasting carrots, parsnips, sweet potatoes and peppers makes them lovely and sweet. Choosing sweeter fruits- bananas, ripe berries etc? Xx