Absolutely worth it!! The taste of a homegrown tomato is something out of this world, and I will never ever buy a store bought tomato. And yes, some of the crops will definitely save you money. If you want to save money, then grow the veggies that you use frequently and that are more costly (broccoli, sweet peppers, or spinach, for instance). Start out small with your garden, that way you won't be intimidated in the middle of summer when you need to weed, water, and harvest a huge patch. and think of all the benefit and fun that you're passing on to your daughter who will learn about the joys of gardening, too. she can help you pick the tomatoes!
I have many links that may be of interest to you to get you started. if you want, you can contact me off this list ____@____.com for more ideas. There are fantastic resources on how to create a garden in an afternoon, with no digging or weeding. Good luck!