As I have said many times before, it takes a lot of planning and prepping; and healthy foods can and often cost more. Start slow and do what is most important to you and your family; it is worth it in the long run.
Here are some great sites that have helped me along the way by providing information, motivation, recipes, meal ideas and planning help, ideas for cooking on a budget, and, most of all, inspiration. There are tons of meal ideas and recipes here and remember you can always change recipes up to better suit your own likes and needs. A recipe is merely a guideline.
The most important site for me (the one that got me started on my real food journey over a year ago):
http://www.100daysofrealfood.com/
Other helpful sites:
http://thenourishinghome.com/
http://www.bloodsugarsolution.com/category/recipes/
http://thecoconutmama.com/
http://www.thegraciouspantry.com/
http://www.stacymakescents.com/
http://foodformyfamily.com/
http://www.jsyfruitveggies.org/Recipes/BreakfastLunchDinner.html
Hope these sites are helpful :)