my whey powder has 79g Protein / 100g at €16/kg
tinned chick peas have 6.4g / 100g at €3,36 / kg

so about twice as expensive if my math is right. i guess dried and buying in bulk would seriously drop chick pea price, but also chick peas are not a complete protein and dried chick peas are quite a hassle.

yes vegan will do it. i’ll look into soy granular as i’m not too happy with dairy myself.

What protein source is cheaper than protein powder? i pay 16€/kg for whey protein

hugely depends on the social setting and maturity of the people involved.