One thing that is often surprising to new SAHMs is how MESSY the house gets. At this point (having been home and not in rotation quite a bit, I just revel in how clean it is when I'm working).
It can be hard to quantify... but when you're HOME all day (or running 10,000 errands) the house mess just becomes springloaded. Working, most people are only home for morning madness and dinner/bath/bed. A couple hours. Then the weekend, which is novel enough that it's pretty easy to pick up after yourself and everyone else.
It is a MILLION times harder to keep your house clean when you're SAHM'ing. So be prepared for that. Even if all you did was sit on the couch and stand and sit and stand... the cushions get all messed up. Being IN the house the floor gets all messy.
PERSONALLY (owning a dog and possessing a homeschooled 9yo)
- I have to sweep and mop every day. It takes 20 minutes. If I don't... the floor gets sticky, gritty, hairy, icky. (When we had carpet, I'd vacuum every day)
- I wash the table and counters twice a day (2 minutes each AFTER decluttering; 5-15 minutes) Flat surfaces collect things. They also get used, a LOT. When you're cooking 3 or more times a day (even if it's just making sammies for one and cereal for one) the kitchen and the table get messy FAST.
- I do at least 2 loads of laundry every day. Like you, theoretically I could do one load per day. If I did that, I'd be up to my eyeballs in dirty clothes and sleeping on dirty sheets and the bathroom would stink of pee because someone missed and got the shower curtain, and we'd all be walking around covered in food, paint, grit, and stinky clothes. (Esp with an infant in the house.)
Those are my bare bones daily things (not including cooking).
WEEKLY I 'field day' on Thursdays. Scrub the whole house. I also deep clean one room every OTHER day (I need a day off in between to keep up moral).
This system, as long as nothing happens, works great. I have a clean, good smelling, welcoming home the vast majority of the time. But HA! One really fun day, or one really bad day, and one gets a week behind in just a few hours.
Just be prepared for your schedule going out the window at least once a week.