A latte made with nonfat or 1% milk is fine, and you can have it every day if you like.
The limit on dairy (milk and yogurt) in phase 1 is 2 cups per day, so be sure to count the milk in the latte towards that. The official recommendation is to limit caffeinated drinks to no more than one or two daily, but some of our members drink more than that with no problem.
There's no particular limit on beans, but the serving size is 1/3 to 1/2 cup. In other words, try to limit it to that amount at one meal or snack. You can have more than one serving per day, though, so you could end up eating several in a day if you like.
You can substitute a small V-8 (the vegetable juice, not fruit juice blends, etc.) for a 1/2 cup serving of vegetables if you like. Most people who do that do it at breakfast, but you could also have it at snack time or even with a meal. The sugar in V-8 vegetable juice is from tomatoes and other vegetables - it's not added refined sugar. It's healthy, and will help keep your energy levels up without causing cravings or blood sugar spikes and crashes, like a sugary drink would.