Avocados are relatively expensive where I am, ~$1.50 a piece. An avocado is 240 calories. That's 160 calories/dollar. To meet all of your calories for the day on just avocados that would be about $12.50 to $18.75, for 2000 calories and 3000 calories respectively. That's pretty cheap, and I know they're less than half that price if you go south a bit.
Avocados are relatively expensive where I am, ~$1.50 a piece. An avocado is 240 calories. That's 160 calories/dollar. To meet all of your calories for the day on just avocados that would be about $12.50 to $18.75, for 2000 calories and 3000 calories respectively. That's pretty cheap, and I know they're less than half that price if you go south a bit.