well I've made my own variant of cannabis milk (I call it bhang after the indian concoction.)
https://www.rollitup.org/cooking-cannabis/360725-bhang-stove-top.html
basically the point here is that you don't have to use heavy whipping cream or anything like that.
if you do the math, 2% milk has 5 grams of fat per cup. say you're using 11 grams of bud like I did, that bud is only going to have 18-20% cannabinoids max, so you assume that you're only getting 2.1 grams of pure cannabinoids, 2:5 is a great ratio for fat therefore the 2% fat milk will absorb all the cannabinoids you need to get hella fuckin high.