Speaking as a man who works from home most of the time, I don't think you're being unreasonable OP.
I've found that I can vacuum the ground floor of the house in around 15-minutes. Then the first flight of stairs in around 3-minutes the first floor in about 8-minutes, second flight of stairs in sub 3-minutes and the top floor in about 4-minutes. Probably half-an-hour to do a thorough job on the whole house. however as the dog isn't allowed upstairs, only the ground floor gets vacuumed daily.
I can take the laundry from the two baskets and load the washing machine in around 40 seconds. The machine then washes the clothes and an hour later, I can remove the washed clothes and put them into the tumble-dryer, where they will dry with no effort from me. Whilst that's happening, I can put the second load of laundry (coloureds not whites this time) into the washing machine in around 30-seconds and let the machine wash that bundle of clothes. I can then pop back up the stairs and make our bed in around 50-seconds. After which I can walk the dog for an hour, answer a few emails and make some calls.
When I get back, I can unload the first pile of laundry and put the next lot in from the washing-machine and take the dry stuff upstairs and dump it on a bed for the other half to sort out.
Then I'll re-load the dishwasher correctly - in the way it's designer intended - and set it to run for a couple of hours (I don't have to stay with it whilst it's washing the dishes, it does it all on it's own)
By now it'll be close to 10 o'clock, so I can get down to some serious work for 2 or 3 hours and when the dishwasher beeps, I can come out and remove the dry laundry (dump it with the other stuff) put some soup in the microwave - don't need to do anything but push a button - and unload the dishwasher and put everything away (takes about the same time as the soup, maybe 2-minutes)
Then I can take my soup back into my study, get back to some serious work for another 4 hours, befre starting supper. I estimate most days, it takes me about 30-minutes to do supper, weekend maybe an hour and a half.
So a typical day, is:
15 mins vacuum
2 mins on laundry
1 minute to make bed
3 minutes on dishwasher
30 minutes on supper
Call it an hour if it's bin day. (Not counting the dog walking)
35-40 hours doing the paid job.
Other half does the ironing, putting clothes away, cleaning loos and showers and going to Waitrose at the weekend, plus a 30-hour job, 5 minutes down the road.
My step-sons are both out school and teenagers so obviously there's no real work there; we think it's a good balance.