If weight loss is your goal, it's actually cheaper and easier and far, far more pleasant to just make smoothies for a couple of meals a day. Here's an easy one that I make all the time:
* 1/2 cup yogurt
* 1/2 cup juice (apple, orange, whatever)
* 1 banana, peeled
* 3-4 frozen strawberries
* 1/2 cup frozen blueberries
Toss in blender. Blend. Consume. Rinse out blender. From assembling ingredients to rinsing the blender, the whole process can be performed in <10 minutes, and is far less disgusting and dehumanizing than consuming bland nutrient goo. Total ingredient cost for one week of daily smoothies is <$10.
A big part of what makes us human is that we take pleasure in eating good food. It's a shame to throw that part of your humanity away unnecessarily.