I've been doing homemade kefir for ages. It's not very time consuming (although daily) and it's yummy the way I do it.
I use a large, glass Aladdin Ice Tea jug to easily separate the whey every day as it stays at the bottom. My chickens get kefir/whey "eggy oatmeal" a few times a week too. A plastic strainer, a rubber spatula and any old blender and you're in business! I fooled the wife by matching the flavor of the store-bought pomegranate almost perfectly and putting it in "their" container. After she finished it, I asked her how it was. She said: "It's the same as it always is, why?" hehehehe I prefer my strawberry/banana and cherry/vanilla a wee bit thicker though. It's more drinkable yogurt than a milk smoothie. I've made many, many different flavors but the only one we didn't like was chocolate, believe it or not. I tried 3 or 4 different ways, but it just won't work! yuk! But nearly any fruit you can think of is fine.