Hillbilly Housewife's 40 dollar menu is here
http://www.hillbillyhousewife.com/40dollarmenu.htm
one change I would make to it is that she has tea with every meal. The tannins in tea inhibit iron absorption, so I would have tea between meals instead of with it. To improve iron uptake from vegetarian sources, try and include a small serve of juice for adults as well as kids.
she includes a link to the same basic menu with links at
http://www.familyresource.com/health/healthy-eating/the-1-week-45-dollar-emergency-menu-feeds-4-6-people