I am a SAHM with 1yo at home and 4yo at school.
1yo is in Childcare 2 mornings a week and a couple of hours in a crèche as needed.
Even then, it isn't enough time to "get everything done". We have a 4-bed detached house. Keeping it relatively clean and tidy is a mission. I do treat being a SAHM as my job.
The 1yo is a nutter quite physical and requires constant supervision when here. Getting housework done with him around is impossible because he cries at the vacuum cleaner, jumps into the duvet covers and tries to climb the ironing board. When not doing that he is trying to break every bone in his body by throwing himself off furniture.
His naps (2 hours at a time) don't often coincide with us being at home. He falls asleep in the car. Then do I risk moving him to his cot and wake him up so that I can do the ironing? Sometimes yes, sometimes no. Sometimes I am just glad of some quiet time.
I do have a cleaner every other week and sometimes drop off ironing etc because I can't get it all done.
And then there is all the admin and financial stuff, a good few hours on the computer a week.
Birthday cards and presents. Thank you cards. I do all of that.
And a bit of playtime for the 1yo and social time for me, or I'd go stir crazy. I try to grab a couple of hours of me-time a week whilst he's at nursery. Had my hair done this week, might be a manicure next week, for example. Or just a bit of Mumsnetting.
FWIW, my DH does nothing, he works long hours and often has to work at weekends too, and when not working is too tired to do anything else.
So...the answer is, for me, I don't get as much done as you might think. For example, have just realised I don't have any food in for dinner, so it'll be a takeaway tonight.