Well, I'm willing to offer help in this area, but I have a couple questions first.... where in Dallas are you located? I'm in McKinney and if the commute is too long, it might not work. Also, I, too am a SAHM and have a 3.5yo son with me all day everyday. Would it be okay to bring him with me?? He does get along well with other children pretty well. Your son may enjoy having a friend to play with, I don't know. How many loads would you have? It would probably take most, if not half of the day.
I have been a nanny for most of my life, so I do have a lot of experience washing other people's clothes and putting them away like they like it done. The only problem I have is ironing- I don't normally iron, but I take the clothes out of the dryer fast enough and hang them so they don't usually need ironing. I haven't actually ironed anything in years. With little ones around, it's kind of dangerous too- probably something better saved for little one's sleepy time. My niece has a horrible burn on her hand from the iron and an accident when she was 1 or 2 (is now 16).