Google for the "Environmental Working Group" and they have a list of the "top offenders", fruits and veggies that generally have the greatest pesticide "load." You can get a good "bang for your buck" that way. Also, roadside stands and smaller farmers, even if not organic, generally have less pesticides.
Organic meat can be expensive. Keep in mind that pesticides and toxins usually stay in the animal's fat more than the muscle, so leaner meat *may* have less. (Of course, cutting back on meat is even better, but only if you get some GOOD vegetarian recipes. I don't want your husband to completely revolt.) Things like butter, that are pretty much ALL fat, that's a good choice to buy the organic alternative, rather than skim milk, that has less fat. If you can gradually scale back the meat and replace with veggies or soy, that would be about the healthiest thing to do for your family and your planet.
As far as the cleaners, not all of them work as well, which caused a little backlash in my household. Simple Green is VERY powerful stuff, though. I also had pretty good luck with "Seventh Generation" cleaners. They also make (disposable) diapers that don't use bleach (more for the environment than for your baby), and they are VERY soft. They don't have that crinkly plastic between the legs that I've found with Pampers/huggies/luvs etc. (I tried cloth diapers, but I just couldn't do it.)
Also, google for homemade cleaners. A little baking soda, lemon juice, salt, and vinegar can go a long way and save $$$. (Although the vinegar smells pretty terrible, so stock up on some lavender or citrus oils or sprays.)