Here is what I started with today at 6:45 (with approximate cost)
2 pounds white beans ($2)
And I'm going to bed with this:
A belly full of tacos for myself and my five year old plus leftovers
Here is the time that took. Please notice that a great deal of this time was spent just hanging out, watching TV, doing dishes, catching fireflies, etc. with just 2-5 minute tasks interspersed. You don't have to be stuck in the kitchen an entire day to get some quick prep work done. By cooking beans to this point now, you can make bean dishes take about half as long or you can cook them even longer and get the cooking time when you are ready to make a meal from them even shorter.
7:00 Rinse beans and put on stove