Home pesto maker here. It's not for the faint of heart. Each year I grow four basil plants - it takes close to an hour to completely de-leaf and de-stem just one plant. I end up with a stock pot full of leaves. Those are then ground with pine nuts (close to $7 for a small jar - I need 4-5 jars), close to a gallon of olive oil (the brand I use comes in gallons, so about $30), and lots of cheese (I honestly don't remember how much I spend on cheese). The result is great, but it's definitely a day's work plus close to $100.